Omega Seamaster 300 Co-Axial Watch (188.8.131.52.01.001). Caliber 8400 automatic Co-Axial movement with central seconds hand. Black dial, index hour markers and Arabic numerals at 12, 3, 6 and 9 o`clock position. Black ceramic bezel stamped with diving scale in Arabic numerals set on a 41mm stainless steel case. Sapphire crystal on top and exhibition case back. Water resistant to 300M. Stainless steel bracelet.