Here is an elegant vintage Omega Constellation watch dating to 1966, according to its movement serial number: 23890761. This watch has been professionally serviced, running strong and very precise. The automatic movement is an Omega calibre 561 with 24 jewels. The factory's original finish pie pan dial is in very good condition, showing visible age spots. The unpolished solid gold bezel + medallion, with gold capped lugs over steel case is in very good condition. The case design is called the Constellation "Round" case model. Brand new case gasket. Original hidden signed crown. This design is to prevent the crown from catching the sleeve of your shirt. Original signed acrylic crystal in excellent condition. The case model is 168.004 and measures 35.6mm across, excluding the crown by 40.6mm lug tip to lug tip. The watch will come with a new 18mm genuine leather strap. The wrist size in the photo is 6 inches.