A two-day marine chronometer

A two-day marine chronometer
by Glashtte, No.12406, circa 1960's
Frosted silvered dial signed and numbered Glashtte 12406, Roman hour numerals, subsidiary seconds and up-and-down dials, yellow metal hands, the back plate signed GUB, Glashtte SA, 12406, brass bowl, gimball ring numbered 12406, locking arm, set within a two tier case with drop handles, securing clip, and glazed top with plaque stamped GUB 12406 Glashtter Uhrenbetriebe Glashtte/Sa.
10cm. dial diam., 18cm. sq. box.