MODEL: 18138 S/NO: "R241xxx" SERIES YEAR 1987. Chronometer in 18K solid yellow gold case 36mm , four lugs factory set with diamonds. Case fitted with original Rolex 18K yellow gold diamond bezel, special original Rolex dial with sapphire and diamonds as index markers. Fitted with original Rolex 18K yellow gold bracelet at 99% mint condition, automatic movement 3155, sapphire crystal.