Here's a very impressive and well preserved FIRST generation vintage Longines Conquest Calendar Automatic. Conquest Longines is the equivalent of a Constellation Omega. The unpolished case is original and in very good condition. Brand new crystal. The case dimension is 35mm across excluding the crown by 42.5mm lug tip to lug tip. Case model is 9004-1 (601). Will come with a brand new 18mm handmade genuine leather strap. The dial is factory original and nicely patina with visible age spots. The automatic movement is Longines caliber 19ASD and has been recently serviced. Movement serial number is 9931411 dating this watch to 1956. Rare and well preserved vintage Longines similar to this is scarce in today's market. A must have piece for a Longines Enthusiast.