Raymond Weil, operating with a self-winding mechanical movement (automatic). Here are the basic details visible on the back cover of the watch: Brand: Raymond Weil Geneve. Movement: Caliber RW 4200 (Swiss-made automatic movement). Jewels: The watch contains 26 jewels, which are synthetic rubies used in mechanical watches to reduce friction and wear on moving parts. Glass: The watch is equipped with "Sapphire Crystal", known for its high scratch resistance. Water Resistance: The watch is water-resistant up to 100 meters (equivalent to 10 ATM or 330 feet). Material: The case and bracelet are made of stainless steel, with gold accents as shown in the picture. The transparent exhibition case back allows you to see the oscillating weight (the piece that moves with your wrist's motion to wind the watch) and the mechanical movement inside. Material: Stainless Steel Movement Type: Automatic Watch Size: 38mm Features: Water Resistant