---
description: Generic case back sapphire for Patek Philippe Nautilus 5740. 27.9mm round, gasket included. Scratch-resistant. Compatible, not OEM.
title: Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm - Sofly
image: https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg
---
[Skip to content](#content)
- [Home](https://www.soflypart.com)
-
- [Products](https://www.soflypart.com/shop/)
-
- [Watch Parts](https://www.soflypart.com/product-category/watch-parts/)
-
- [Patek Philippe Crystal](https://www.soflypart.com/product-category/watch-parts/watch-crystals/patek-philippe-crystal/)
-
- [Watch Crystals](https://www.soflypart.com/product-category/watch-parts/watch-crystals/)
-
- **Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm**
[](https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg)
# Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm
$45.00
You Saved
| Brand | Choose an option Patek Philippe- 
Clear |
| --- | --- |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $45.00 |
| 3 - 4 | 5% | $42.75 |
| 5 - 9 | 7% | $41.85 |
| 10 - 14 | 10% | $40.50 |
| 15+ | 15% | $38.25 |
### Discount
| Quantity | Discount (%) | Price |
| --- | --- | --- |
| 1 - 2 | — | $45.00 |
| 3 - 4 | 5% | $42.75 |
| 5 - 9 | 7% | $41.85 |
| 10 - 14 | 10% | $40.50 |
| 15+ | 15% | $38.25 |
Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm quantity
Add to cart
x
[Checkout](https://www.soflypart.com/checkout/)
- Covers 99% of Repair Needs
- Wholesale Discounts
- Fast Global Shipping
- 24/7 Customer Support
## Product Description
This generic flat round sapphire crystal is designed for the Patek Philippe Nautilus 5740 case back, measuring 27.9mm in diameter with a thickness of 1.0mm. Including a gasket, it offers excellent optical clarity and scratch resistance for reliable case back glass replacement.
## Features & Function
- Flat round shape ensures precise fit for case back opening
- 1.0mm thickness provides balanced strength and slim profile
- Gasket included for easier installation and basic sealing
- High hardness (9 Mohs) resists daily scratches and wear
## Specifications
- Diameter: 27.9 mm
- Thickness: 1.0 mm
- Included: Gasket
- Shape: Flat Round
- Material: Synthetic sapphire
- Compatible Model: Patek Philippe Nautilus 5740 (case back)
## Applications
- Replacement case back crystal for Patek Philippe Nautilus 5740
- Ideal for restoring movement visibility in exhibition case backs
## FAQs
*1.Is this an original Patek Philippe part?*
No, it is a generic compatible crystal with gasket, not OEM.
*2.Will it fit my Nautilus 5740 case back perfectly?*
Only if your case back uses exactly 27.9mm round glass; measure before purchase.
*3.Does the included gasket guarantee waterproofing?*
No, it aids sealing but professional pressure testing is recommended after installation.
## 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**.
##### Our Popular Items
[](https://www.soflypart.com/product/generic-cartier-tank-wsta0042-4322-sapphire-crystal-18-9mm/)
### [Generic Cartier Tank WSTA0042/4322 Sapphire Crystal 18.9mm](https://www.soflypart.com/product/generic-cartier-tank-wsta0042-4322-sapphire-crystal-18-9mm/)
[](https://www.soflypart.com/product/generic-rolex-caliber-1220-1225-mainspring/)
### [Generic Rolex Caliber 1220/1225 Mainspring](https://www.soflypart.com/product/generic-rolex-caliber-1220-1225-mainspring/)
[](https://www.soflypart.com/product/generic-rolex-4030-mainspring/)
### [Generic Rolex 4030 Mainspring](https://www.soflypart.com/product/generic-rolex-4030-mainspring/)
[](https://www.soflypart.com/product/generic-rolex-2030-2035-mainspring/)
### [Generic Rolex 2030/2035 Mainspring](https://www.soflypart.com/product/generic-rolex-2030-2035-mainspring/)
[](https://www.soflypart.com/product/cartier-caliber-191-mainspring/)
### [Cartier Caliber 191 Mainspring](https://www.soflypart.com/product/cartier-caliber-191-mainspring/)
[](https://www.soflypart.com/product/eta-e03-001-4000-circuit-block-electronic-module/)
### [ETA E03.001-4000 Circuit Block Electronic Module](https://www.soflypart.com/product/eta-e03-001-4000-circuit-block-electronic-module/)
[](https://www.soflypart.com/product/generic-zenith-el-primero-chronomaster-02-0310-400-sapphire-crystal-29-85mm/)
### [Generic Zenith El Primero Chronomaster 02.0310.400 Sapphire Crystal 29.85mm](https://www.soflypart.com/product/generic-zenith-el-primero-chronomaster-02-0310-400-sapphire-crystal-29-85mm/)
[](https://www.soflypart.com/product/generic-breguet-classique-5920-5907-sapphire-crystal-30-5mm/)
### [Generic Breguet Classique 5920/5907 Sapphire Crystal 30.5mm](https://www.soflypart.com/product/generic-breguet-classique-5920-5907-sapphire-crystal-30-5mm/)
[](https://www.soflypart.com/product/hattori-vd55-vd57-circuit-block-electronic-module/)
### [Hattori VD55/VD57 Circuit Block Electronic Module](https://www.soflypart.com/product/hattori-vd55-vd57-circuit-block-electronic-module/)
[](https://www.soflypart.com/product/eta-caliber-2000-1471-stop-pinion/)
### [ETA Caliber 2000-1471 Stop Pinion](https://www.soflypart.com/product/eta-caliber-2000-1471-stop-pinion/)
- [](https://www.soflypart.com/product/generic-rolex-3135-mainspring/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-rolex-3135-mainspring/)Watch Parts [Generic Rolex 3130/3135 Mainspring
](https://www.soflypart.com/product/generic-rolex-3135-mainspring/) $8.00
You Saved
- [](https://www.soflypart.com/product/generic-omega-seamaster-diver-2220-80-tube-090st4203/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-omega-seamaster-diver-2220-80-tube-090st4203/)Watch Parts [Generic Omega Seamaster Diver 2220.80 Tube 090ST4203
](https://www.soflypart.com/product/generic-omega-seamaster-diver-2220-80-tube-090st4203/) $12.00
You Saved
- [](https://www.soflypart.com/product/eta-2671-movement-auxiliary-reversing-wheel/)Quick View [Add to Cart](https://www.soflypart.com/product/eta-2671-movement-auxiliary-reversing-wheel/)Watch Movement Parts [ETA 2671-1530 Movement Auxiliary Reversing Wheel
](https://www.soflypart.com/product/eta-2671-movement-auxiliary-reversing-wheel/) $10.00
You Saved
- [](https://www.soflypart.com/product/ronda-751-movement-hour-wheel/)Quick View [Add to Cart](https://www.soflypart.com/product/ronda-751-movement-hour-wheel/)Watch Movement Parts [Ronda Hour Wheel 751
](https://www.soflypart.com/product/ronda-751-movement-hour-wheel/) $1.30
You Saved
- [](https://www.soflypart.com/product/cartier-caliber-1847-pallet-fork/)Quick View [Add to Cart](https://www.soflypart.com/product/cartier-caliber-1847-pallet-fork/)Watch Parts [Cartier Caliber 1847/1904-PS Pallet Fork
](https://www.soflypart.com/product/cartier-caliber-1847-pallet-fork/) $155.00
You Saved
- [](https://www.soflypart.com/product/generic-zenith-port-royal-open-03-0540-4021-sapphire-crystal-29-9mm/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-zenith-port-royal-open-03-0540-4021-sapphire-crystal-29-9mm/)Watch Parts [Generic Zenith Port Royal Open 03.0540.4021 Sapphire Crystal 29.9mm
](https://www.soflypart.com/product/generic-zenith-port-royal-open-03-0540-4021-sapphire-crystal-29-9mm/) $95.00
You Saved
- [](https://www.soflypart.com/product/generic-2135-550-pinion-for-oscillating-weight/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-2135-550-pinion-for-oscillating-weight/)Watch Parts [Generic Rolex 2135-550 Pinion For Oscillating Weight
](https://www.soflypart.com/product/generic-2135-550-pinion-for-oscillating-weight/) $12.00
You Saved
- [](https://www.soflypart.com/product/generic-rolex-cellini-50505-50509-sapphire-crystal-with-gasket/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-rolex-cellini-50505-50509-sapphire-crystal-with-gasket/)Watch Parts [Generic Rolex Cellini 50505 Sapphire Crystal
](https://www.soflypart.com/product/generic-rolex-cellini-50505-50509-sapphire-crystal-with-gasket/) $75.00
You Saved
- [](https://www.soflypart.com/product/generic-tag-heuer-hc0179-black-crown-screw-down-7-0mm/)Quick View [Add to Cart](https://www.soflypart.com/product/generic-tag-heuer-hc0179-black-crown-screw-down-7-0mm/)Watch Parts [Generic TAG Heuer HC0179 Black Crown Screw Down 7.0mm
](https://www.soflypart.com/product/generic-tag-heuer-hc0179-black-crown-screw-down-7-0mm/) $25.00
You Saved
- [](https://www.soflypart.com/product/rolex-caliber-3235-421-pallet-fork/)Quick View [Add to Cart](https://www.soflypart.com/product/rolex-caliber-3235-421-pallet-fork/)Watch Parts [Rolex Caliber 3235-421 Pallet Fork
](https://www.soflypart.com/product/rolex-caliber-3235-421-pallet-fork/) $130.00
You Saved
```json
{"@context":"https://schema.org","@graph":[{"@type":["Store","Organization"],"@id":"https://www.soflypart.com/#organization","name":"Sofly","url":"https://www.soflypart.com","logo":{"@type":"ImageObject","@id":"https://www.soflypart.com/#logo","url":"https://www.soflypart.com/wp-content/uploads/2019/12/Sofly-logo.png","contentUrl":"https://www.soflypart.com/wp-content/uploads/2019/12/Sofly-logo.png","caption":"Soflypart","inLanguage":"en-US","width":"180","height":"62"},"openingHours":["Mo,Tu,We,Th,Fr,Sa,Su 09:00-17:00"],"image":{"@id":"https://www.soflypart.com/#logo"}},{"@type":"WebSite","@id":"https://www.soflypart.com/#website","url":"https://www.soflypart.com","name":"Soflypart","publisher":{"@id":"https://www.soflypart.com/#organization"},"inLanguage":"en-US"},{"@type":"ImageObject","@id":"https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg","url":"https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg","width":"580","height":"580","caption":"Patek Philippe Nautilus 5726 Crystal","inLanguage":"en-US"},{"@type":"BreadcrumbList","@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/#breadcrumb","itemListElement":[{"@type":"ListItem","position":"1","item":{"@id":"https://www.soflypart.com","name":"Home"}},{"@type":"ListItem","position":"2","item":{"@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/","name":"Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm"}}]},{"@type":"WebPage","@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/#webpage","url":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/","name":"Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm - Sofly","datePublished":"2022-03-28T19:54:22+08:00","dateModified":"2026-06-25T16:10:53+08:00","isPartOf":{"@id":"https://www.soflypart.com/#website"},"primaryImageOfPage":{"@id":"https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg"},"inLanguage":"en-US","breadcrumb":{"@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/#breadcrumb"}},{"@type":"ProductGroup","name":"Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm - Sofly","description":"Generic case back sapphire for Patek Philippe Nautilus 5740. 27.9mm round, gasket included. Scratch-resistant. Compatible, not OEM.","sku":"330102130","category":"Watch Parts","mainEntityOfPage":{"@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/#webpage"},"image":[{"@type":"ImageObject","url":"https://www.soflypart.com/wp-content/uploads/2022/03/DSC08718.jpg","height":"580","width":"580"}],"url":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/","productGroupID":"330102130","hasVariant":[{"@type":"Product","sku":"330102130","name":"Generic Patek Philippe Nautilus 5740 Case Back Sapphire Crystal With Gasket 27.9mm - Patek Philippe","description":"Product Description This generic flat round sapphire crystal is designed for the Patek Philippe Nautilus 5740 case back, measuring 27.9mm in diameter with a thickness of 1.0mm. Including a gasket, it offers excellent optical clarity and scratch resistance for reliable case back glass replacement. Features & Function Flat round shape ensures precise fit for case back opening 1.0mm thickness provides balanced strength and slim profile Gasket included for easier installation and basic sealing High hardness (9 Mohs) resists daily scratches and wear Specifications Diameter: 27.9 mm Thickness: 1.0 mm Included: Gasket Shape: Flat Round Material: Synthetic sapphire Compatible Model: Patek Philippe Nautilus 5740 (case back) Applications Replacement case back crystal for Patek Philippe Nautilus 5740 Ideal for restoring movement visibility in exhibition case backs FAQs 1.Is this an original Patek Philippe part? No, it is a generic compatible crystal with gasket, not OEM. 2.Will it fit my Nautilus 5740 case back perfectly? Only if your case back uses exactly 27.9mm round glass; measure before purchase. 3.Does the included gasket guarantee waterproofing? No, it aids sealing but professional pressure testing is recommended after installation. 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/2022/03/DSC08718-150x150.jpg","offers":{"@type":"Offer","description":"Product Description This generic flat round sapphire crystal is designed for the Patek Philippe Nautilus 5740 case back, measuring 27.9mm in diameter with a thickness of 1.0mm. Including a gasket, it offers excellent optical clarity and scratch resistance for reliable case back glass replacement. Features & Function Flat round shape ensures precise fit for case back opening 1.0mm thickness provides balanced strength and slim profile Gasket included for easier installation and basic sealing High hardness (9 Mohs) resists daily scratches and wear Specifications Diameter: 27.9 mm Thickness: 1.0 mm Included: Gasket Shape: Flat Round Material: Synthetic sapphire Compatible Model: Patek Philippe Nautilus 5740 (case back) Applications Replacement case back crystal for Patek Philippe Nautilus 5740 Ideal for restoring movement visibility in exhibition case backs FAQs 1.Is this an original Patek Philippe part? No, it is a generic compatible crystal with gasket, not OEM. 2.Will it fit my Nautilus 5740 case back perfectly? Only if your case back uses exactly 27.9mm round glass; measure before purchase. 3.Does the included gasket guarantee waterproofing? No, it aids sealing but professional pressure testing is recommended after installation. 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":"45","priceCurrency":"USD","availability":"http://schema.org/InStock","itemCondition":"NewCondition","priceValidUntil":"2027-12-31","url":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/?attribute_pa_brand=patek-philippe"}}],"@id":"https://www.soflypart.com/product/generic-patek-philippe-nautilus-5740-case-back-sapphire-crystal-with-gasket-27-9mm/#richSnippet"}]}
```