---
description: Generic sapphire crystal for Breguet Marine 5817. 31.5mm domed, 2.6mm height, AR coating. Scratch-resistant aftermarket replacement for original.
title: Generic Breguet Sapphire Crystal For Marine 5817 31.5mm - Sofly
image: https://www.soflypart.com/wp-content/uploads/2025/05/Breguet-Marine-5817-sapphire-crystal.png
---

 

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* **Generic Breguet Sapphire Crystal For Marine 5817 31.5mm**

[![Breguet Marine 5817 Crystal](https://www.soflypart.com/wp-content/uploads/2025/05/Breguet-Marine-5817-sapphire-crystal-600x600.png)](https://www.soflypart.com/wp-content/uploads/2025/05/Breguet-Marine-5817-sapphire-crystal.png)

# Generic Breguet Sapphire Crystal For Marine 5817 31.5mm

$45.00  
You Saved 

| Brand | Choose an optionBreguet![Breguet](https://www.soflypart.com/wp-content/uploads/2023/06/25.jpg)[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 Breguet Sapphire Crystal For Marine 5817 31.5mm quantity 

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## Product Description

This is a generic replacement sapphire crystal for the Breguet Marine reference 5817 (40mm case), measuring 31.5mm (diameter) × 2.6mm (overall height) × 1.6mm (edge thickness) with a domed round profile. Made of synthetic sapphire glass (Mohs 9), it offers exceptional scratch resistance and excellent optical clarity, often with anti‑reflective (AR) coating, serving as a direct substitute for a damaged or scratched original crystal. As an aftermarket part, it provides watchmakers and enthusiasts with a cost‑effective solution to restore the iconic nautical‑vintage appearance of the Marine 5817.

## Key Features & Specifications

* **Sapphire Material** – Mohs 9, highly scratch-resistant and optically clear.
* **Domed Round Profile** – Raised center with thinner edges, providing a vintage domed appearance matching the original.
* **Anti-Reflective Coating** – Reduces glare, enhances dial legibility, especially in bright marine environments.
* **Precise Dimensions** – 31.5mm diameter, 2.6mm overall height, 1.6mm edge thickness, designed for the Marine 5817 case.
* **Aftermarket Advantage** – Significantly lower cost than genuine parts, reducing repair downtime. Suitable for first-generation Marine 5817 (steel or gold).

| Parameter        | Details                                        |
| ---------------- | ---------------------------------------------- |
| Compatible Model | Breguet Marine 5817 (40mm case, steel or gold) |
| Material         | Synthetic sapphire (Mohs 9)                    |
| Shape            | Domed round                                    |
| Diameter         | 31.5 mm                                        |
| Overall Height   | 2.6 mm                                         |
| Edge Thickness   | 1.6 mm                                         |
| Coating          | Anti-reflective (AR)                           |
| Type             | Generic aftermarket                            |

## FAQ

**1\. Is this a genuine Breguet crystal?**  
No. It is a generic aftermarket replacement, not original, but dimensionally identical to the Marine 5817 crystal.

**2\. How can I be sure this crystal fits my 5817?**  
Measure your original crystal’s diameter (31.5mm), overall height (2.6mm), and edge thickness (1.6mm). If they match, it will fit. Both steel and gold versions use the same crystal.

**3\. Will the anti-reflective coating peel off?**  
It will not peel under normal use. Avoid abrasion with hard objects or harsh cleaning. Fine scratches may appear over time – this is normal.

**4\. What should I pay attention to during installation?**  
Use a new sealing gasket, apply UV adhesive or crystal glue to the edge, and press evenly with a crystal press. Professional installation is recommended.

**5\. Will the original water resistance be maintained?**  
The Marine 5817 is typically 100m water resistant. Proper installation with a new gasket can restore similar water resistance. A water resistance test is advised 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**.

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Made of synthetic sapphire glass (Mohs 9), it offers exceptional scratch resistance and excellent optical clarity, often with anti\u2011reflective (AR) coating, serving as a direct substitute for a damaged or scratched original crystal. As an aftermarket part, it provides watchmakers and enthusiasts with a cost\u2011effective solution to restore the iconic nautical\u2011vintage appearance of the Marine 5817. Key Features &amp; Specifications Sapphire Material\u00a0\u2013 Mohs 9, highly scratch-resistant and optically clear. Domed Round Profile\u00a0\u2013 Raised center with thinner edges, providing a vintage domed appearance matching the original. Anti-Reflective Coating\u00a0\u2013 Reduces glare, enhances dial legibility, especially in bright marine environments. Precise Dimensions\u00a0\u2013 31.5mm diameter, 2.6mm overall height, 1.6mm edge thickness, designed for the Marine 5817 case. Aftermarket Advantage\u00a0\u2013 Significantly lower cost than genuine parts, reducing repair downtime. Suitable for first-generation Marine 5817 (steel or gold). Parameter Details Compatible Model Breguet Marine 5817 (40mm case, steel or gold) Material Synthetic sapphire (Mohs 9) Shape Domed round Diameter 31.5 mm Overall Height 2.6 mm Edge Thickness 1.6 mm Coating Anti-reflective (AR) Type Generic aftermarket FAQ 1. Is this a genuine Breguet crystal? No. It is a generic aftermarket replacement, not original, but dimensionally identical to the Marine 5817 crystal. 2. How can I be sure this crystal fits my 5817? Measure your original crystal\u2019s diameter (31.5mm), overall height (2.6mm), and edge thickness (1.6mm). If they match, it will fit. Both steel and gold versions use the same crystal. 3. Will the anti-reflective coating peel off? It will not peel under normal use. Avoid abrasion with hard objects or harsh cleaning. Fine scratches may appear over time \u2013 this is normal. 4. What should I pay attention to during installation? Use a new sealing gasket, apply UV adhesive or crystal glue to the edge, and press evenly with a crystal press. Professional installation is recommended. 5. Will the original water resistance be maintained? The Marine 5817 is typically 100m water resistant. Proper installation with a new gasket can restore similar water resistance. A water resistance test is advised 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/2025/05/Breguet-Marine-5817-sapphire-crystal-150x150.png","offers":{"@type":"Offer","description":"Product Description This is a generic replacement sapphire crystal for the Breguet Marine reference 5817 (40mm case), measuring 31.5mm (diameter) \u00d7 2.6mm (overall height) \u00d7 1.6mm (edge thickness) with a domed round profile. Made of synthetic sapphire glass (Mohs 9), it offers exceptional scratch resistance and excellent optical clarity, often with anti\u2011reflective (AR) coating, serving as a direct substitute for a damaged or scratched original crystal. As an aftermarket part, it provides watchmakers and enthusiasts with a cost\u2011effective solution to restore the iconic nautical\u2011vintage appearance of the Marine 5817. Key Features &amp; Specifications Sapphire Material\u00a0\u2013 Mohs 9, highly scratch-resistant and optically clear. Domed Round Profile\u00a0\u2013 Raised center with thinner edges, providing a vintage domed appearance matching the original. Anti-Reflective Coating\u00a0\u2013 Reduces glare, enhances dial legibility, especially in bright marine environments. Precise Dimensions\u00a0\u2013 31.5mm diameter, 2.6mm overall height, 1.6mm edge thickness, designed for the Marine 5817 case. Aftermarket Advantage\u00a0\u2013 Significantly lower cost than genuine parts, reducing repair downtime. Suitable for first-generation Marine 5817 (steel or gold). Parameter Details Compatible Model Breguet Marine 5817 (40mm case, steel or gold) Material Synthetic sapphire (Mohs 9) Shape Domed round Diameter 31.5 mm Overall Height 2.6 mm Edge Thickness 1.6 mm Coating Anti-reflective (AR) Type Generic aftermarket FAQ 1. Is this a genuine Breguet crystal? No. It is a generic aftermarket replacement, not original, but dimensionally identical to the Marine 5817 crystal. 2. How can I be sure this crystal fits my 5817? Measure your original crystal\u2019s diameter (31.5mm), overall height (2.6mm), and edge thickness (1.6mm). If they match, it will fit. Both steel and gold versions use the same crystal. 3. Will the anti-reflective coating peel off? It will not peel under normal use. Avoid abrasion with hard objects or harsh cleaning. Fine scratches may appear over time \u2013 this is normal. 4. What should I pay attention to during installation? Use a new sealing gasket, apply UV adhesive or crystal glue to the edge, and press evenly with a crystal press. Professional installation is recommended. 5. Will the original water resistance be maintained? The Marine 5817 is typically 100m water resistant. Proper installation with a new gasket can restore similar water resistance. A water resistance test is advised 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-breguet-sapphire-crystal-for-marine-5817-31-5mm/?attribute_pa_brand=breguet"}}],"@id":"https://www.soflypart.com/product/generic-breguet-sapphire-crystal-for-marine-5817-31-5mm/#richSnippet"}]}
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