A German mahogany two-day chronometer, GUB 10241, circa 1968

9.5-cm engraved silvered dial with Roman numerals signed Glashütte 10241, subsidiaries for up/down and seconds, gilt hands, fusee movement signed GUB Glashütte SA 241 with spotted plates and maintaining power, detent escapement with bi-metallic balance and helical spring, fitted in a brass bowl case gimbal fitted in a two tier mahogany box with bevelled glass top panel, similarly signed, accompanied by a copy from the Glashütter archives and a certificate from the Glashütter Uhrenmuseum