Breitling Premier B21 Chronograph Tourbillon 42 Gaston Breitling

Breitling's Premier B21 Chronograph Tourbillon 42 Gaston Breitling, reference JB2120A61B1P1, is a chronograph with a 42 mm white gold case. The case is 15.25 mm thick and has a fixed bezel. Breitling rates the case to 100 metres. Calibre B21 is self-winding and has a power reserve of 55 hours. A sapphire crystal covers the grey dial, and the watch has a display back. The tourbillon is a listed complication. An alligator leather strap with a white gold folding clasp is fitted to the watch.