2023-08
--- Improved skull diamond-setting precision, better symmetry & polishing
--- Optimized sapphire-like case transparency for higher light transmission
--- Stabilized custom tourbillon movement with better winding efficiency
2022-05
--- Upgraded skeleton frame finishing, closer to genuine RM structure
--- Enhanced strap quality with softer, more durable rubber
--- Improved anti-reflective coating on the crystal
2021-03
--- Initial release of the RM52-01 "One-Eyed Skull" transparent replica
--- Basic transparent composite case with entry-level manual tourbillon
--- Simplified skeletonized design with standard decorative screws