4072 chronograph, ‘50s 18k rose gold round case, engraved case-back, rectangular pushers. Argenté dial, applied indexes. Hand-winding movement. Vacheron Constantin leather strap. Size: 35 mm. Notes: Reference 4072 was in production from 1938 until the late 1960s, and is one of the most iconic and sought after vintage chronograph made by Vacheron Constantin. It is a very diverse model, cased most often in yellow gold and rarely in pink gold, stainless steel, or steel and gold.