c.1966 Omega Constellation Calendar. The 34mm case is stainless steel with snap back embossed with a gold observatory. The dial is a light silver and is a calendar model. The straight batons and Arabic numerals on hour markers are mated with guilt hands that are original and in nice condition. The movement is Omegas finest chronometer rated automatic, tested in 5 positions. The strap is black leather with a stainless steel Omega buckle. The most desired era of Omega Constellations and a popular piece for daily use.