BULGARI: Optical Illusion Collection: onyx gold spin ring 

18k white gold optical spinning with steel mechanism and onyx disc. Signed BVLGARI.
Hallmarked "750 - STEEL". IT size 11.5 - US size 6. Weight 23 g.
Item condition grading: ***** excellent.
Prague, auction No. 308 _ September 19th 2024, Lot No. 4.