Arnold & Son A&S6003

The A&S6003 is a manual-winding in-house caliber from Arnold & Son, launched in 2016. It features the TB88 True Beat seconds, a dead-beat complication that displays seconds on a separate scale similar to a jumping seconds, a rare and traditional horological feature. The movement belongs to the A&S family of manufacture calibers and remains in production. Notable watches using this caliber include the Arnold & Son TB88 True Beat.