This very rare Omega Seamaster 120 automatic dive chronograph is known as the “Big Blue” and was produced around 1974. The massive case is similar to the Omega Flightmaster and measures a whopping 44x52mm and is 16mm thick. This case is in excellent overall condition, without any major dings or scratches. The caliber 1040 automatic winding movement with 24-hour indicator is accurate, with all functions working perfectly. The original unidirectional bezel and insert is original and as clean as you’ll ever find! The original screw-down winding crown is present. The Omega bracelet has very minor stretch and is in excellent shape as well. The original hands and sea-blue dial are in absolutely flawless shape! The markers still glow on this dial! This is a prime example of a very rare Omega dive watch that is very hard to find!