愛彼,非常精細及極罕有,鉑金帎形腕錶,配三問功能及旋轉時間,”John Schaeffer Star Wheel”,限量生產,編號10/10,型號25881PT,約1995年製
Audemars Piguet manufactured their first minute repeating wristwatch in 1907 for the renowned American industrialist John Schaeffer. This customised pioneer version was housed in a cushion-shaped case, the numerals on the dial were personalised with the letters of his name instead of numerals. In the early 1990s, Audemars Piguet launched the “John Shaeffer” limited edition series, paying tribute to the original “coussin tortue” or “cushion turtle” design. The “Star Wheel” system was invented by the firm at the same period, including different variations of “wandering hour” wristwatches. Three transparent sapphire disks, or star wheels, each inscribed with four hour indicators are attached to a rotating centre wheel. As the assembly turns, the indicator for the actual hour is rotated into view and then passed across a 120-degree minutes sector. The time is read by noting the visible hour pointing to the current minute. Each disk is obscured until it rises into the arc where the background contrasts the digits into legibility.