Breitling - Premier B21 Chronograph Tourbillon 42   replica Breitling Premier Heritage B21   Breitling introduces the Premier B21 Chronograph Tourbillon 42, featuring three new chronograph models crafted from precious metals and centered around a tourbillon at 12 o'clock. The tourbillon houses the balance wheel, hairspring, and escapement within a rotating cage, keeping the entire...