Los Angeles,CA: Jack Built Toy Manufacturing Co., 1956. #701:98. Color illus. by Bob Dalton. Square Sm.4to. Spiral bound board book. Lt. wear extremities, 1" scuff front board. Clock with hands mounted final board. VG+. 
Here is a simple, educational game for teaching the time. The child discovers that there are only three things to know and the mystery of the clock is solved.