To celebrate the first 10 years in business, the watchmaker Pierre DeRoche unveils this quite classy pocket watch. Featuring a 30-minutes chronograph and a perpetual calendar with moonphases crammed in a small 18kt gold case is already impressive, yet what makes this a sought-after watch for collectors is the original LeCoultre caliber from 1920 ticking in the inside. This genuinely unique piece also features three emeralds at 6 and 12 o’clock and one on the winding crown.