Yale & Towne Manufacturing Co., Stamford, Connecticut - 2 movements, Page 4 

  A

  B

  C

  D

                                                          E

Both A and B are the same model using identical type movements but with different metals used for the case and associated bolt mechanism. The color of metal as well as the treatment used on the surface (plain, or some variety of damascene) would be chosen to compliment surrounding vault door mechanism. Some exterior decoration took on fanciful designs. See Diebold locks. file 45

C. Model K22. c. 1920 -1950's. Timer contains a regular 72 hour Type T E. Howard movement as well as a modified Seth Thomas Type T movement that has a 7 hour duration. Type T movements were the smallest coffin style movements made for Yale. See close up last photo for D, below. The timers could be set for intervals as short as 15 minutes. This was an inter-day lock used to keep a small vault or cash drawer secured for short periods of time during the day and was combined with the other regular lock for longer periods. This results in a quandary, as for periods longer than the maximum of 7 hours on the inter-day timer the safe is controlled by only one time lock.   These modified movements were never popular and few locks equipped with them exist.  Case also has unusual push-button door release rather than normal key lock. The movements are consecutively numbered T2881 and T2882. To see another Yale with this rare type of combination of regular and modified movements click here. file 82

D. Model K22. c. 1900 -1930's. Same as in 'C' but with two regular Type T movements and in a different style case. The movements and dials are consecutively numbered 33536 and 33537. Case #213. file 108

E. c. 1930 - 1950's. This timer contains two modified Seth Thomas Type T movements that each have a 7 hour duration. Type T movements were the smallest coffin style movements made for Yale. The bottom photo shows the switch provided to stop the movement at will by engaging a small pin against the balance wheel at any time during operation (knob located within red square). The timers could be set for intervals as short as 15 minutes. This was an inter-day lock used to keep a small vault or cash drawer secured for short periods of time during the day. These modified movements were never popular and few locks equipped with them exist. The movements are consecutively numbered T3661 and T3662. A later version of this lock from the 1950's. file 62