After 30 months of tests and prototypes, B.R.M introduces the Birotor, the only watch with a French made movement. A multitude of technical innovation makes this piece exceptional example of watchmaking. The BRM-Precitime movement is suspended by 4 carbon fiber brackets mounted in 4 shock absorbers with cone-shaped springs from our isolastic system (certified) making a rigid but shock absorbing framework identical to race cars. The BRM-Precitime Birotor automatic movement if unique among luxury watches with it's 2 rotors connected with a differential similar to an automobile. The 2 rotors are set on double ceramic rotor bearings with their weights are of Tantalum The 40 x 48mm titanium case is assembled with functional hex head fasteners at the lugs, allowing for three positions of adjustment. The crown is designed in the shape of a pinion gear stacked on top of another gear. Brand: B.R.M. Model: Birotor Titanium Ref: BRT-1 Movement: Birotor Automatic Case: Titanium Diameter: 40x48mm without crown Strap: Original rubber strap Strap length: 22cm with case Clasp: Original Condition: Worn&Good condition Extras: No Box, No Papers (The box appears that in pictures is my shooting platform) The watch has not been tested on being waterproof, so we do not give any guarantees on it. Shipping via Fedex or UPS (Its so safe and fast)