Audemars Piguet Audemars Piguet Ultra-Thin (Pre-owned - Good) — USD 8,600 on eBay

Rare and historically important AP 'Sun-Ray' tourbillon reference 25643 from the 1980s was the first automatic tourbillon watch, under 5mm thin. Held record for 30 years until beaten by Bvlgari in 2015.

Audemars Piguet's revolutionary ref. 25643, introduced in 1986, marked a new era with its front-facing tourbillon and an exquisite design by Jacqueline Dimier, possibly inspired by Egyptian art or Astronomy.

Audemars Piguet is one of the few major watchmaking companies that has been able to remain a family run business. It has retained its worship of quality and fine finishing in the place of the worship of profit as has fallen most of the rest of industry worldwide. It is a particular pleasure to be ab