Cal. 1 was an 18 ligne pin-set pocket watch movement produced by Robert Frères (later called Minerva) from about 1895 through the early 1940s. It was a basic movement with a cylinder escapement and was usually cased with an open face.
Cal. 1 was an 18 ligne pin-set pocket watch movement produced by Robert Frères (later called Minerva) from about 1895 through the early 1940s. It was a basic movement with a cylinder escapement and was usually cased with an open face.