Rare Rectangular Omega Constellation in 18k yellow gold on a leather strap. Ref 153042. Circa 1970 Fine Pre-owned Omega Watch.

Two-body, solid, polished and brushed, faceted lugs, crown set with Tiger’s Eye cabochon, sapphire.crystal. D. Gold, clous de Paris, with applied gold and black baton indexes for the quarters. M. Cal. 712.copper-colored, 24 jewels, straight-line lever escapement, monometallic balance, shock absorber.self-compensating flat balance spring, micrometric index regulator..Dial, case and movement signed..Dim. 27 x 41 mm. Thickness 7.2 mm. 

 Collectability: This specific reference is considered "rare" because the 18k solid gold versions with the oversized rectangular case were produced in much smaller quantities than the standard steel or gold-capped round models.