Heuer, Valjoux 23 powered, step lug design, chronograph, silver dial, rare yellow gold, circa 1950s. The case is 14k yellow gold which is rare among Heuer watches which often produces steel models. The dial is a unique design of the 1950s with applied bar indexes and dauphine hands, and combined with the solid 14k gold case with step lug design, it is a gem with a wonderful luxurious features. It is equipped with the famous Cal.23 made by Valjoux, which has been adopted by many brands including Rolex. The back cover is engraved.