This 34.5mm Omega Constellation Calendar dates to 1959. This gold-capped case has teardrop lugs, correct Omega winding crown, gold-medallion observatory case back, steel sides, and a beveled bezel. The automatic winding chronometer-grade Omega movement is adjusted to five positions and temperatures. This gold dial with very attractive patina is all original and looks much cleaner in person. The gold markers and Dauphine hands adds to the vintage look. The Constellation Calendar is an uncommon variation in the Constellation line. These particular models are becoming hard to find these days.