Here is a spectacular Omega Seamaster Automatic Calendar watch. This automatic calendar watch is the third generation of the "Seamaster Calendar" model, and it is the first Omega Seamaster model to carry a calendar disc for the 3 o'clock position. The 20 jewels movement is an Omega caliber 503 with a swan neck regulator. It has been fully serviced and running accurately. The movement serial number is 17092847, dating this watch to 1959. Factory original dial excellent condition. Original signed crown. Original signed crystal—brand new 18mm matching high-quality genuine leather strap. The gold capped over stainless steel original case measures 34.4mm, excluding the crown by 42.4mm lug tip to lug tip. Case model 2849-9 SC. The calendar feature is working accurately. This watch is in original unpolished condition. Rare jumbo size Seamaster emblem case back. The wrist size in the photo is 6 inches.