This vintage New Old Stock Eberhard & Co. Contodat ref. 31502, an exceptionally rare 1960s chronograph crafted in 18 kt yellow gold. This timepiece features a 38 mm case with sharp, sculpted lugs and a refined snap-back construction. The dial presents a brushed silver tone with applied yellow gold baton indexes, subsidiary seconds and 30-minute counter, date aperture, and outer tachymeter scale. Powered by a mechanical hand-wound chronograph movement (cal. 310-82), it reflects the precision and craftsmanship of classic Swiss watchmaking. Preserved in New Old Stock condition, it offers outstanding originality and collector appeal.