描述
Audemars Piguet, ultra-thin perpetual calendar, Ref. Model: 25657, gold version 1,982-1993, a total of more than 1,800 pieces, loaded with 2120 automatic winding movement is also the thinnest perpetual calendar movement in history, white downward dial layout harmony, 36mm diameter, thickness only 7.5mm, high with rare folding buckle,