For Part. Rolex Crown for Datejust 16233 (18k Gold)From the photos, this appears to be a Rolex crown for a Datejust ref. 16233 in 18k yellow gold, or a high-quality replacement compatible with that model. Below is a clear breakdown.

For Part. Correct specifications for Rolex 16233

For a genuine Rolex Datejust 16233, the correct crown is:

• Crown type: Triplock
• Diameter: approx. 6.0 mm
• Tube: Rolex 24-600
• Crown reference: 603-0
• Material: 18k yellow gold (solid, not plated)
• Water resistance system: Triplock (3 gaskets)

What your photos show

Details that match an original Rolex crown:

• 👑 Sharp Rolex coronet logo with correct proportions
• 🔩 Deep, even knurling (edge teeth)
• 🧿 Triplock gasket system visible inside
• ⚙️ Clean, precise threading
• ✨ Correct warm gold tone (not bright or thin like plating)
• 🧴 Black internal gaskets present

These are all strong indicators and are hard to fake cheaply.

What cannot be confirmed from photos alone

To be 100% certain, one of the following is needed:

1. Internal “603” marking (only visible when fully disassembled)
2. Exact weight check (18k gold has a specific mass)
3. Test fit on an original Rolex 24-600 tube
4. Provenance (Rolex packaging, AD or watchmaker source)

Possible alternatives to keep in mind

It could still be:

• A high-end aftermarket solid-gold crown
• A refinished or previously used genuine Rolex crown
• A genuine Rolex crown made for a different reference, but compatible

Conclusion

• ✔️ Correct for Datejust 16233
• ✔️ Construction matches Rolex Triplock design
• 🔎 Very likely genuine, but not 100% confirmed without physical inspection

If you want, I can:

• Compare it with a known genuine 603-0
• Explain how to test it yourself
• Estimate market value
• Help identify if it’s aftermarket vs Rolex original