- Sapphire crystal case – hardness can pass a diamond tester
- Original‑data case
- 18k solid gold interior / decorative elements
- Automatic rotor
- Full‑featured tourbillon movement
This RM88 is a showstopper. The whole case is carved from sapphire crystal – so hard it can pass a diamond tester. Original‑data case for perfect fit, 18k solid gold accents inside, and an automatic tourbillon movement with a full set of complications. Fun on the outside, serious mechanics on the inside.