The watch being offered at Sotheby's on July 14 is lot no. 28 – Breguet
link no. 1297, which is a four-minute Breguet tourbillon, similar in some technical respects to no. 1176. However, no. 1297 has a thermometer and
link uses, instead of Breguet's echappement naturel, a Robin escapement (for a brief discussion of the Robin escapement in a
link different context, see our Introducing post for the new Grand Seiko Hi-Beat escapement).