Audemar Piguet "Curvtagon" ref.5418BA from 1975

The nickname "Curvtagon"  captures the distinctive and harmonious blend of circular, rectangular, and cushion shapes that define this watch. This striking fusion sets the watch apart from the brand’s more traditional offerings of the same era. Its black matte dial evokes the rugged elegance of Rolex sports watches from that period, while the bold "AP" logo at 12 o’clock adds a unique touch. Powering this exceptional timepiece is the legendary Caliber 2121, which, at just 3.05 mm thick, was once the world’s thinnest self-winding movement with a date indication. This groundbreaking movement famously drove the iconic Royal Oak Ref. 5402 "Jumbo," solidifying its place in horological history.

Maker: Audemars Piguet 
Model: Automatic 
Reference: 5418BA
Year: 1976
Case No: 93xxxx
Material: 18k white gold 
Dimensions: 32.5mm height x 35mm width; 6mm thickness 
Crystal: Mineral glass 
Lume: None
Caliber: Audemars Piguet, self-winding, caliber 2121 
Bracelet/Strap: Teal Alligator strap
Lug Width: 18mm 
Box/Papers: N/A