Patek Philippe Ellipse, vintage ladies watch

in 18kt yellow gold cushion case 26.5x25 mm. ref. 4312 - 2759345, bezel set with brilliant cut diamonds circa 1.20 ct, black onyx dial without numbers, sapphire crystal, crown with cabochon cut black onyx, mechanical movement with manual winding, series no. 1275829, caliber 16 - 250, signed case, dial and movement, original leather strap with signed 18kt yellow gold buckle