Here is a stunning vintage Omega Constellation watch dating to 1964 according to its movement serial number 21252447. This case design is known as the round case model with short straight case lugs. This watch has been professionally serviced and is now running accurately. The automatic movement is an Omega caliber 561 with 24 jewels. The factory original dial is in very good condition with minor visible age spots. Gold tone with black onyx original hour indexes (the 12 o'clock right hour index has partial surface chip, but not very noticeable). The case is made of solid stainless steel. Brand new case back gasket. Crystal is brand new. Original hidden signed crown. Case model is 168.004 and measures 36mm across excluding the crown by 40.5mm lug tip to lug tip. Making this case model one of the biggest (diameter wise) Constellation model. Watch will come with a matching high quality 18mm croco grain genuine leather strap. Wrist size in photo is 6 inches.