Generic Zenith El Primero Open 35.1230.4021 Case Back Sapphire Crystal 28.5mm

Product Description

This generic domed sapphire crystal is designed for the Zenith El Primero Open 35.1230.4021 case back, measuring 28.5mm in diameter with a dome height of 3.6mm and edge thickness of 1.5mm. Featuring blue reflective coating and including a gasket, it offers excellent optical clarity and scratch resistance for reliable case back glass replacement.

Features & Function

• Domed shape provides enhanced aesthetics for exhibition case backs

• Blue reflective coating reduces glare and adds elegant appearance

• Gasket included for easier installation and basic sealing

• High hardness (9 Mohs) resists daily scratches and wear

Specifications

• Diameter: 28.5 mm

• Dome Height: 3.6 mm

• Edge Thickness: 1.5 mm

• Coating: Blue reflective

• Included: Gasket

• Shape: Domed

• Material: Synthetic sapphire

• Compatible Reference: Zenith El Primero Open 35.1230.4021

Applications

• Replacement case back crystal for Zenith El Primero Open 35.1230.4021

• Ideal for restoring movement visibility in exhibition case backs

FAQs

1.Is this an original Zenith part?
No, it is a generic compatible crystal with gasket, not OEM.

2.Will it fit my El Primero Open case back perfectly?
Only if your case back uses exactly 28.5mm domed glass; measure before purchase.

3.Does the included gasket guarantee waterproofing?
No, it aids sealing but professional pressure testing is recommended after installation.

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