An exceptional and highly collectible piece from Audemars Piguet’s archives, the Cobra Ref. 5403 stands out as one of the maison’s most daring and innovative designs from the golden era of integrated bracelet watches. Crafted entirely in solid 18k yellow gold, the Cobra embodies avant-garde luxury with its unique flowing case and bracelet architecture, earning its name from the serpent-like aesthetic. This ultra-rare reference is elevated further by its sunburst golden dial, beautifully adorned with diamond-set indices, offering a touch of refined opulence while retaining AP’s hallmark elegance. Powered by a high-precision automatic movement, the watch blends technical excellence with striking aesthetics. Accompanied by Audemars Piguet service papers, an official extract from the archives, and its original AP leather pouch, this example represents a true grail piece for vintage AP collectors, rarely seen on the market and celebrated as a masterpiece of 1970s high horology design.