Here is a rare Omega Seamaster Automatic Calendar watch. This bumper automatic calendar watch is the first generation of the "Seamaster Calendar" model, and it is the first Omega watch movement to carry a calendar disc. The 17 jewels movement is an Omega caliber 353 with a pointer regulator. It has been fully serviced and running accurately. The movement serial number is 13112254 dating this watch to 1952. Creamy-aged original dial in well-patina condition. Gold original set of dauphine hands. Original signed crown. Crystal is brand new. Brand new 18mm matching high-quality genuine leather strap. The solid stainless steel original case measures 35.3mm excluding the crown by 43.2mm lug tip to lug tip. Case model 2627 - 5 SC. Calendar feature working accurately. This watch is in its original unpolished condition. Great investment timepiece! Wrist size in photo is 6 inches.