In 2016, German watchmaker Karsten Frässdorf founded Montres KF, specializing in custom and bespoke watches based around his impressive hacking tourbillon movement. Deeply inspired by the feats of engineering in marine chronometers, his most striking accomplishment is reviving the compensation balance wheel, which once held the key to finding longitude at sea. The balance features his own patented design with a balance bar that extends as temperature increases, enabling the arms to compress inwards, increasing the speed of its oscillation to compensate for the change in elasticity of the hairspring.