This Vacheron & Constantin Ref. 4591, is a rare and elegant vintage rectangular wristwatch crafted in 18K yellow gold, dating from the mid-20th century. The distinctive flared case measures approximately 24 × 38 mm, giving the watch its characteristic elongated Art Deco-inspired profile. It features a refined silvered-white guilloché dial, with applied gold geometric hour markers, gold hands and a subsidiary seconds register at 6 o’clock. The watch is powered by the prestigious manual-winding Vacheron & Constantin calibre 435/3C, a finely finished Swiss mechanical movement with 17 jewels. The curved case and elegant proportions make this reference a particularly distinctive example of vintage Vacheron & Constantin craftsmanship.