---
description: Generic IWC Calibre 89365 winding stem. Aftermarket replacement for 89365 flyback chronograph. 0.9/1.2mm tap.
title: Generic IWC Calibre 89365 Winding Stem - Sofly
image: https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-0.9-winding-stem.jpg
---
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- **Generic IWC Calibre 89365 Winding Stem**
[](https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-0.9-winding-stem.jpg)
[](https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-1.2-winding-stem.jpg)
# Generic IWC Calibre 89365 Winding Stem
$35.00
You Saved
| Brand | Choose an option IWC- 
|
| --- | --- |
| Size | Choose an option 1.2mm 0.9mmClear |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $35.00 |
| 3 - 4 | 5% | $33.25 |
| 5 - 9 | 7% | $32.55 |
| 10 - 14 | 10% | $31.50 |
| 15+ | 15% | $29.75 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $35.00 |
| 3 - 4 | 5% | $33.25 |
| 5 - 9 | 7% | $32.55 |
| 10 - 14 | 10% | $31.50 |
| 15+ | 15% | $29.75 |
Generic IWC Calibre 89365 Winding Stem quantity
Add to cart
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## Product Description
The Generic IWC Calibre 89365 Winding Stem is a high-quality aftermarket replacement component specifically engineered for the IWC-manufactured 89365 automatic flyback chronograph movement. Available with two precision-ground thread options—0.9 mm (Tap 10) and 1.2 mm (Tap 7)—this stainless steel stem serves as the critical mechanical link between the crown and the movement‘s keyless works, enabling smooth manual winding via the crown’s pull-out positions, precise time-setting with stop-seconds/hacking function, and reliable crown engagement.
## Features & Function
- **Precision-engineered compatibility** – Specifically designed to fit IWC‘s in-house Calibre 89365 automatic flyback chronograph movement, which features a bidirectional Pellaton pawl-winding system, column-wheel chronograph, and 68-hour power reserve.
- **Dual thread size options** – Available in two precision-ground thread sizes to suit different crown tube specifications: 0.9 mm (Tap 10, the most widely used stem size) or 1.2 mm (Tap 7).
- **Three-position crown operation** – Supports manual winding (position 1), date correction (position 2), and precise time-setting with stop-seconds/hacking function (position 3), consistent with original IWC crown operation.
- **Durable stainless steel construction** – Manufactured from high-grade stainless steel with precision-ground threads to withstand repeated winding cycles and ensure excellent long-term wear resistance.
- **Cost-effective restoration** – Provides a practical, readily available alternative to scarce and expensive genuine OEM parts for routine movement overhauls, professional servicing, and daily-wear restoration.
## Specifications
| Parameter | Value |
| --- | --- |
| Compatible Caliber | IWC Calibre 89365 (self-winding flyback chronograph) |
| Genuine OEM Part Reference | 89365-201 (winding stem) |
| Movement Lignes | 13‴ 1/4 |
| Movement Diameter | 29.89 mm |
| Movement Jewels | 38 |
| Movement Components | 294 |
| Movement Frequency | 28,800 vph (4 Hz) |
| Power Reserve | 68 hours |
| Chronograph Type | Flyback, column-wheel |
| Winding System | Bidirectional Pellaton pawl-winding system |
| Crown Positions | 3 (winding / date / hacking time-setting) |
| Stem Thread Options | 0.9 mm (Tap 10) / 1.2 mm (Tap 7) |
| Material | High-grade stainless steel |
| Product Type | Aftermarket replacement part / Generic part |
| Unit Quantity | 1 piece per order |
## Applications
- Replacement of worn, broken, or damaged winding stems during professional servicing of IWC Calibre 89365 watches, including Pilot‘s Watch Spitfire Chronograph (Refs. IW387801, IW387802, IW387803, IW387804), Pilot’s Watch Chronograph Top Gun Miramar (Ref. IW388001), Aquatimer Chronograph Edition Expedition Charles Darwin (Ref. IW379504), Aquatimer Chronograph Edition Galapagos Islands (Ref. IW379503), and other references equipped with the 89365 movement.
- Professional watch repair centres and independent watchmakers performing movement overhauls that require disassembly of the keyless works and crown stem replacement.
- Restoration of pre-owned IWC timepieces where original stem threads are stripped, the stem is bent or broken, crown function is compromised, or the watch exhibits symptoms of worn winding mechanism.
- Selection between 0.9 mm (Tap 10) and 1.2 mm (Tap 7) thread options based on the specific crown tube compatibility of the watch case.
## Frequently Asked Questions
**Q1: Is this winding stem an authentic genuine IWC part?**
No, this is a generic aftermarket replacement product, not manufactured by IWC. It is designed to meet the compatible specifications for the Calibre 89365 movement and should not be confused with genuine OEM components (genuine IWC part number is referenced as 89365‑201). For routine servicing and daily‑wear restoration, a quality generic stem from a reputable supplier offers a practical solution; for museum‑grade restorations requiring absolute factory authenticity, genuine OEM parts are recommended.
**Q2: What do the thread size options 0.9 mm and 1.2 mm refer to?**
These refer to the external thread diameter of the winding stem that engages with the crown. The 0.9 mm option corresponds to the industry standard Tap 10, which is the most widely used winding stem size. The 1.2 mm option corresponds to Tap 7. The two sizes are not interchangeable within the same crown tube; you must select the option that matches your crown‘s threaded hole diameter. If unsure, measure your crown’s threaded hole or consult a professional watchmaker before purchase.
**Q3: Which calibers is this generic stem compatible with?**
This generic stem is specifically designed for the IWC Calibre 89365 automatic flyback chronograph movement. It is not compatible with other IWC calibers such as the 89360 (hour totalizer variant), 89361, 89400, or 89630 unless confirmed by the movement reference. Always verify compatibility with your specific movement reference before purchase.
## Why Choose SOFLY Watch Parts?
- Fast worldwide shipping within 3 business days.
- Competitive pricing on Seiko/Hattori calibers.
- 3,000+ watch movements and parts in stock.
- Trusted by watchmakers worldwide.
- Personalized sourcing support via **info@soflypart.com** or WhatsApp **+86 18620212114**.
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Aftermarket replacement for 89365 flyback chronograph. 0.9/1.2mm tap.","sku":"330307104","category":"Watch Parts","mainEntityOfPage":{"@id":"https://www.soflypart.com/product/generic-iwc-calibre-89365-winding-stem/#webpage"},"image":[{"@type":"ImageObject","url":"https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-0.9-winding-stem.jpg","height":"580","width":"580"},{"@type":"ImageObject","url":"https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-1.2-winding-stem.jpg","height":"580","width":"580"}],"url":"https://www.soflypart.com/product/generic-iwc-calibre-89365-winding-stem/","productGroupID":"330307104","hasVariant":[{"@type":"Product","sku":"330307104","name":"Generic IWC Calibre 89365 Winding Stem - IWC","description":"Product Description The Generic IWC Calibre 89365 Winding Stem is a high-quality aftermarket replacement component specifically engineered for the IWC-manufactured 89365 automatic flyback chronograph movement. Available with two precision-ground thread options\u20140.9 mm (Tap 10) and 1.2 mm (Tap 7)\u2014this stainless steel stem serves as the critical mechanical link between the crown and the movement\u2018s keyless works, enabling smooth manual winding via the crown\u2019s pull-out positions, precise time-setting with stop-seconds/hacking function, and reliable crown engagement.\u00a0 Features & Function Precision-engineered compatibility\u00a0\u2013 Specifically designed to fit IWC\u2018s in-house Calibre 89365 automatic flyback chronograph movement, which features a bidirectional Pellaton pawl-winding system, column-wheel chronograph, and 68-hour power reserve. Dual thread size options\u00a0\u2013 Available in two precision-ground thread sizes to suit different crown tube specifications: 0.9 mm (Tap 10, the most widely used stem size) or 1.2 mm (Tap 7). Three-position crown operation\u00a0\u2013 Supports manual winding (position 1), date correction (position 2), and precise time-setting with stop-seconds/hacking function (position 3), consistent with original IWC crown operation. Durable stainless steel construction\u00a0\u2013 Manufactured from high-grade stainless steel with precision-ground threads to withstand repeated winding cycles and ensure excellent long-term wear resistance. Cost-effective restoration\u00a0\u2013 Provides a practical, readily available alternative to scarce and expensive genuine OEM parts for routine movement overhauls, professional servicing, and daily-wear restoration. Specifications Parameter Value Compatible Caliber IWC Calibre 89365 (self-winding flyback chronograph) Genuine OEM Part Reference 89365-201 (winding stem) Movement Lignes 13\u2034 1/4 Movement Diameter 29.89 mm Movement Jewels 38 Movement Components 294 Movement Frequency 28,800 vph (4 Hz) Power Reserve 68 hours Chronograph Type Flyback, column-wheel Winding System Bidirectional Pellaton pawl-winding system Crown Positions 3 (winding / date / hacking time-setting) Stem Thread Options 0.9 mm (Tap 10) / 1.2 mm (Tap 7) Material High-grade stainless steel Product Type Aftermarket replacement part / Generic part Unit Quantity 1 piece per order Applications Replacement of worn, broken, or damaged winding stems during professional servicing of IWC Calibre 89365 watches, including Pilot\u2018s Watch Spitfire Chronograph (Refs. IW387801, IW387802, IW387803, IW387804), Pilot\u2019s Watch Chronograph Top Gun Miramar (Ref. IW388001), Aquatimer Chronograph Edition Expedition Charles Darwin (Ref. IW379504), Aquatimer Chronograph Edition Galapagos Islands (Ref. IW379503), and other references equipped with the 89365 movement. Professional watch repair centres and independent watchmakers performing movement overhauls that require disassembly of the keyless works and crown stem replacement. Restoration of pre-owned IWC timepieces where original stem threads are stripped, the stem is bent or broken, crown function is compromised, or the watch exhibits symptoms of worn winding mechanism. Selection between 0.9 mm (Tap 10) and 1.2 mm (Tap 7) thread options based on the specific crown tube compatibility of the watch case. Frequently Asked Questions Q1: Is this winding stem an authentic genuine IWC part? No, this is a generic aftermarket replacement product, not manufactured by IWC. It is designed to meet the compatible specifications for the Calibre 89365 movement and should not be confused with genuine OEM components (genuine IWC part number is referenced as 89365\u2011201). For routine servicing and daily\u2011wear restoration, a quality generic stem from a reputable supplier offers a practical solution; for museum\u2011grade restorations requiring absolute factory authenticity, genuine OEM parts are recommended. Q2: What do the thread size options 0.9 mm and 1.2 mm refer to? These refer to the external thread diameter of the winding stem that engages with the crown. The 0.9 mm option corresponds to the industry standard Tap 10, which is the most widely used winding stem size. The 1.2 mm option corresponds to Tap 7. The two sizes are not interchangeable within the same crown tube; you must select the option that matches your crown\u2018s threaded hole diameter. If unsure, measure your crown\u2019s threaded hole or consult a professional watchmaker before purchase. Q3: Which calibers is this generic stem compatible with? This generic stem is specifically designed for the IWC Calibre 89365 automatic flyback chronograph movement. It is not compatible with other IWC calibers such as the 89360 (hour totalizer variant), 89361, 89400, or 89630 unless confirmed by the movement reference. Always verify compatibility with your specific movement reference before purchase. Why Choose SOFLY Watch Parts? Fast worldwide shipping within 3 business days. Competitive pricing on Seiko/Hattori calibers. 3,000+ watch movements and parts in stock. Trusted by watchmakers worldwide. Personalized sourcing support via\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","image":"https://www.soflypart.com/wp-content/uploads/2024/04/IWC-89365-0.9-winding-stem-150x150.jpg","offers":{"@type":"Offer","description":"Product Description The Generic IWC Calibre 89365 Winding Stem is a high-quality aftermarket replacement component specifically engineered for the IWC-manufactured 89365 automatic flyback chronograph movement. Available with two precision-ground thread options\u20140.9 mm (Tap 10) and 1.2 mm (Tap 7)\u2014this stainless steel stem serves as the critical mechanical link between the crown and the movement\u2018s keyless works, enabling smooth manual winding via the crown\u2019s pull-out positions, precise time-setting with stop-seconds/hacking function, and reliable crown engagement.\u00a0 Features & Function Precision-engineered compatibility\u00a0\u2013 Specifically designed to fit IWC\u2018s in-house Calibre 89365 automatic flyback chronograph movement, which features a bidirectional Pellaton pawl-winding system, column-wheel chronograph, and 68-hour power reserve. Dual thread size options\u00a0\u2013 Available in two precision-ground thread sizes to suit different crown tube specifications: 0.9 mm (Tap 10, the most widely used stem size) or 1.2 mm (Tap 7). Three-position crown operation\u00a0\u2013 Supports manual winding (position 1), date correction (position 2), and precise time-setting with stop-seconds/hacking function (position 3), consistent with original IWC crown operation. Durable stainless steel construction\u00a0\u2013 Manufactured from high-grade stainless steel with precision-ground threads to withstand repeated winding cycles and ensure excellent long-term wear resistance. Cost-effective restoration\u00a0\u2013 Provides a practical, readily available alternative to scarce and expensive genuine OEM parts for routine movement overhauls, professional servicing, and daily-wear restoration. Specifications Parameter Value Compatible Caliber IWC Calibre 89365 (self-winding flyback chronograph) Genuine OEM Part Reference 89365-201 (winding stem) Movement Lignes 13\u2034 1/4 Movement Diameter 29.89 mm Movement Jewels 38 Movement Components 294 Movement Frequency 28,800 vph (4 Hz) Power Reserve 68 hours Chronograph Type Flyback, column-wheel Winding System Bidirectional Pellaton pawl-winding system Crown Positions 3 (winding / date / hacking time-setting) Stem Thread Options 0.9 mm (Tap 10) / 1.2 mm (Tap 7) Material High-grade stainless steel Product Type Aftermarket replacement part / Generic part Unit Quantity 1 piece per order Applications Replacement of worn, broken, or damaged winding stems during professional servicing of IWC Calibre 89365 watches, including Pilot\u2018s Watch Spitfire Chronograph (Refs. IW387801, IW387802, IW387803, IW387804), Pilot\u2019s Watch Chronograph Top Gun Miramar (Ref. IW388001), Aquatimer Chronograph Edition Expedition Charles Darwin (Ref. IW379504), Aquatimer Chronograph Edition Galapagos Islands (Ref. IW379503), and other references equipped with the 89365 movement. Professional watch repair centres and independent watchmakers performing movement overhauls that require disassembly of the keyless works and crown stem replacement. Restoration of pre-owned IWC timepieces where original stem threads are stripped, the stem is bent or broken, crown function is compromised, or the watch exhibits symptoms of worn winding mechanism. Selection between 0.9 mm (Tap 10) and 1.2 mm (Tap 7) thread options based on the specific crown tube compatibility of the watch case. Frequently Asked Questions Q1: Is this winding stem an authentic genuine IWC part? No, this is a generic aftermarket replacement product, not manufactured by IWC. It is designed to meet the compatible specifications for the Calibre 89365 movement and should not be confused with genuine OEM components (genuine IWC part number is referenced as 89365\u2011201). For routine servicing and daily\u2011wear restoration, a quality generic stem from a reputable supplier offers a practical solution; for museum\u2011grade restorations requiring absolute factory authenticity, genuine OEM parts are recommended. Q2: What do the thread size options 0.9 mm and 1.2 mm refer to? These refer to the external thread diameter of the winding stem that engages with the crown. The 0.9 mm option corresponds to the industry standard Tap 10, which is the most widely used winding stem size. The 1.2 mm option corresponds to Tap 7. The two sizes are not interchangeable within the same crown tube; you must select the option that matches your crown\u2018s threaded hole diameter. If unsure, measure your crown\u2019s threaded hole or consult a professional watchmaker before purchase. Q3: Which calibers is this generic stem compatible with? This generic stem is specifically designed for the IWC Calibre 89365 automatic flyback chronograph movement. It is not compatible with other IWC calibers such as the 89360 (hour totalizer variant), 89361, 89400, or 89630 unless confirmed by the movement reference. Always verify compatibility with your specific movement reference before purchase. Why Choose SOFLY Watch Parts? Fast worldwide shipping within 3 business days. Competitive pricing on Seiko/Hattori calibers. 3,000+ watch movements and parts in stock. Trusted by watchmakers worldwide. Personalized sourcing support via\u00a0info@soflypart.com\u00a0or WhatsApp\u00a0+86 18620212114.","price":"35","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/generic-iwc-calibre-89365-winding-stem/?attribute_pa_brand=iwc"}}],"@id":"https://www.soflypart.com/product/generic-iwc-calibre-89365-winding-stem/#richSnippet"}]}
```