Here is an elegant vintage Omega Constellation watch dating to 1963, according to its movement serial number: 20972813. 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 superb condition. The unpolished solid gold bezel + medallion, with gold capped lugs over steel case is in very good condition. Some scratches on the bezel near the crown. 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, but it also prevent from hand-winding as well. So this reference rely on the motion of your wrist to self-wind the watch. It can also be difficult to pull the crown out if you have big fingers. If you decide to purchase this timepiece, please message me on Instagram and I will send a couple video clips on how to pull out the crown and even hand wind it. Brand new acrylic crystal. The case model is 168.004-63 and measures 36mm across, excluding the crown by 40mm 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.