This vintage Vacheron et Constantin Calatrava Ref. 6399 is a rare example of the brand’s refined mid-20th-century elegance. Its distinctive three-step 18k yellow gold case, measuring 35mm, embodies the timeless Calatrava aesthetic, combining classical proportions with subtle architectural details. The silvered dial features applied gold hour markers and dauphine hands, offering excellent legibility while maintaining understated sophistication. This reference is powered by a finely crafted manual-winding movement, showcasing Vacheron et Constantin’s hallmark precision and horological artistry. The watch is completed by its original Vacheron buckle, a highly collectible detail that enhances its authenticity and vintage charm.