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This is a generic sapphire crystal designed for the Rolex Datejust reference 69173, measuring 21.3 × 20.6 × 1.45 mm with a flat design, featuring the Rolex coronet logo at 6 o’clock, and includes a sealing gasket. This crystal is also compatible with references 69178, 79173, and 79174. As a generic replacement for the original crystal, it is ideal for replacing damaged or deeply scratched original components.
Original Watch Technical Background :
| Parameter | Value |
|---|---|
| Brand | Rolex |
| Collection | Datejust |
| References | 69173 / 69178 / 79173 / 79174 |
| Case Diameter | 26 mm (69173) / 31 mm (79173) |
| Case Material | Steel + 18K gold / 18K white gold |
| Water Resistance | 100 meters / 10 ATM |
| Movement | Caliber 2135 automatic |
| Original Crystal | Sapphire crystal |
| Instruction | Details |
|---|---|
| Daily Use | The crystal is fixed and requires no daily operation after installation |
| Cleaning | Gently wipe with a soft cloth and mild soapy water; avoid abrasives or strong chemical solvents |
| Viewing Coronet Logo | The laser-etched logo at 6 o’clock is visible at specific angles under light; shine a light from the side to see it |
| Precautions | Sapphire is hard but brittle; avoid strong impacts to prevent shattering |
| Regular Inspection | Annual inspection for cracks or aged seals is recommended |
1. Remove Movement Open the case back and carefully remove the Caliber 2135 automatic movement
2. Remove Old Crystal Use a crystal press to push the old crystal out from inside the case
3. Clean Groove Thoroughly clean the crystal mounting channel inside the case
4. Place Gasket Take the included sealing gasket and place it into the mounting channel, ensuring it sits flat without twisting
5. Place New Crystal Place the new sapphire crystal into the case, ensuring the 6 o’clock coronet logo aligns with the dial’s 6 o’clock position
6. Press Into Place Use a crystal press with appropriate nylon dies to apply even pressure and press the crystal into place
7. Check Installation Verify the crystal is flush and free of gaps
8. Water Test Perform a water resistance test after case back installation to ensure 100m rating
Important Note: Coronet logo alignment is critical – ensure the logo precisely aligns with the dial’s 6 o’clock position. The cyclops (date magnifier) must align perfectly with the date window. Professional installation by a watchmaker is strongly recommended.
| Cleaning | Gently wipe with a soft cloth and mild soapy water; avoid abrasives or strong chemical solvents |
| Scratch Removal | Sapphire crystals cannot be polished; deep scratches require crystal replacement |
| Coronet Logo | The laser-etched logo at 6 o’clock is an anti-counterfeiting feature – should be clearly visible after replacement |
| Gasket Inspection | Check the crystal gasket for aging during each service; replace if necessary |
| Water Resistance Test | Perform a water resistance test after installation and annually thereafter to maintain 100m rating |
| Replacement Interval | Replace only if the crystal is cracked, deeply scratched, or the gasket is aged |
| Movement Service | Powered by Caliber 2135 automatic movement – professional service recommended every 5-7 years |
Q1: Does this crystal have the Rolex crown logo at 6 o‘clock?
A: Yes, this crystal features a laser-etched Rolex coronet logo at the 6 o’clock position, just like the original Rolex sapphire crystals.
Q2: Does this crystal come with a gasket?
A: Yes, a sealing gasket is included with this crystal. No separate purchase is needed.
Q3: Can I install this crystal myself?
A: A crystal press is absolutely required. The installation requires precise alignment of the 6 o‘clock coronet logo. Professional installation by a watchmaker is strongly recommended.
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