The Piaget Altiplano Reference P10920 (often associated with retail reference G0A39110) is a masterclass in ultra-thin haute horlogerie. While it is occasionally mislabeled by secondary market dealers as an automatic, this specific 38mm model is actually powered by the manually-wound Calibre 900P.

  What makes the P10920 so iconic is its merged construction. To achieve a 3.65mm profile, Piaget completely eliminated the boundary between the movement and the exterior case. The 18k white gold case back serves as the actual mainplate of the movement, meaning the gear trains, bridges, and hands are built directly onto the back of the watch itself. 

Because the entire gear train and balance wheel are visible from the front of the watch alongside the off-center dial, it treats the wearer to a spectacular semi-skeletonized architectural view right on the wrist.

• Case Material: 18k White Gold

• Case Diameter: 38 mm

• Total Thickness: An astonishingly slim 3.65 mm (one of the thinnest mechanical watches in existence).

• Movement: Piaget Calibre 900P (Manual-winding with a 48-hour power reserve).

• Dial Design: Semi-skeletonized with an eccentric (off-center) main time display in the upper-left quadrant.