Rotary - A 9ct gold wristwatch

circa 1967, square silvered dial with black and gold coloured quatre batons and black hands, 17 jewel mechanical crown wind movement, case, 11mm wide, case sides with bark finish, verso snap on, interior numbered with London hallmarks for 9ct gold and casemaker's mark of Sylvain Dreyfus, to an integral bark finished brick link bracelet terminating in an adjustable fold over clasp with safety clip, 180mm overall length, 22g ex movement