The Audemars Piguet Reference 3648, known as the Golden Ellipse, is a beautifully distinctive vintage dress watch crafted in 18-karat yellow gold, celebrated for its graceful and unconventional elliptical case shape inspired by the golden ratio. The case presents a slim, refined profile with softly curved lugs that flow naturally from the ellipse-shaped mid-case, all finished to Audemars Piguet's exceptional hand-polishing standards. The dial is elegantly minimalist, typically presented in a deep blue or black lacquered finish with subtle gold hour markers and slender gold hands, creating a sophisticated and timeless aesthetic. Powering the watch is a fine Audemars Piguet mechanical or automatic movement, reflecting the Le Brassus manufacture's deep commitment to in-house watchmaking excellence. The watch sits remarkably slim on the wrist, sliding effortlessly beneath a shirt cuff and making it the perfect companion for formal occasions.