Breitling Top Time B21 Ford Mustang

Breitling's Top Time B21 Ford Mustang, reference NB21251A1L1X1, is a chronograph housed in a 42 mm bronze case. The case measures 15.4 mm thick, with lugs set 20.1 mm apart. A sapphire crystal covers the green dial, and the screwed-in caseback, also sapphire, gives a view of the movement. Power comes from the self-winding calibre B21, built by La Joux-Perret, which stores around 55 hours of reserve. The B21 carries a tourbillon alongside the chronograph function, and a tachymeter scale runs around the dial for measuring speed. Small seconds sit within the layout as well. The watch is fitted to a calfskin leather strap secured by a titanium folding clasp. Breitling rates the case to 100 metres.