Pre-Owned Breitling Top Time B21 model # SB21251A1C1X1 Shelby Cobra Tourbillon with ceramic case, blue dial and blue strap Excellent overall condition. The only signs of visible wear are a few light scuffs on the titanium buckle. Movement Caliber Breitling B21 (Manufacture La Joux-Perret) Movement Self-winding mechanical Power reserve Approx. 55 hours Chronograph 1/4th second, 60 minutes Vibration 28,800 v.p.h Jewel 30 jewels Case Case material Ceramic Caseback With screws Water resistance 10 bars (100 m/330 ft) Bezel Fixed Crown Non screw-locked, two gaskets Crystal Sapphire Dimensions Product Weight (Approx.) 108.21 g Watch-head weight (Approx.) 78.2 g Diameter 44 mm Thickness 15.4 mm Height (upper lug tip to lower lug tip) 52.89 mm Lug width (in-between lug) 22.05 mm Strap Strap material Calfskin leather Strap color Blue Strap type Straight Lug 22/18 mm Buckle material Titanium Buckle type Folding clasp Buckle size 18 mm Serial #7338270 44mm Original Purchase date 3/2025, under Breitling warranty until 2033