This is a super rare and incredible condition Vacheron Constantin Calatrava reference 4073 circa 1947. What makes this watch so special is the ultra rare 2 tone sector dial. We have never seen this dial on this reference Vacheron before. The dial is all original with 2 tone silver and matte sector dial with applied Arabic numeral and subsidiary seconds at 6 oclock. The case on this rare beauty is crisp. I do believe the crown on this watch is a later crown replaced by Vacheron as there is a service sticker on the case back. This watch comes on a super cool beaded bracelet that is not Vacheron Constantin.