Here is a stunning vintage Omega Constellation watch dating to 1957 according to its movement serial number: 15771155. This watch has been professionally serviced running strong and accurately. The automatic movement is an Omega caliber 505 with 24 jewels. The factory original finish two tone pie pan dial is nicely aged and patina. The case is made of solid stainless steel with a solid gold medallion on the case back. Case is in great original unpolished condition. Brand new case gasket. Original correct signed crown. Brand new acrylic crystal. Case model is 2852-9 SC and measures 35mm across excluding the crown by 42.3mm lug tip to lug tip. Watch will come with a matching high quality 18mm genuine leather strap. Wrist size in photo is 6 inches.