Cyma – A base metal military issue open-faced pocket watch

the signed white dial, 45mm diameter, with black Arabic numerals, (originally) luminous hands and subsidiary seconds register at 6 o’clock, signed 15 jewel crown wind mechanical movement number 399363, case, 55mm diameter, verso snap on with pheon stamp, marked ‘G.S.T.P. M 98319’, interior stamped 019529 6818