Here is a stunning vintage Omega Constellation watch dating to 1966, according to its movement serial number: 24500538. This watch has been professionally serviced, running strong and accurately. The automatic movement is an Omega calibre 561 with 24 jewels. The factory's original finish black dial is in great condition with some small blemishes. The case design is called the Constellation "Round" case model. The stainless steel case is in great, original, unpolished condition. Brand new case gasket. Original signed hidden crown, made to not cling against your shirt sleeves. Clean acrylic crystal. The case model is 168.004 and measures 35.6mm 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.