Theodor Kromer K.G., Freiburg, Germany
The Kromer company likely had a licensing agreement with the Yale company for the movement and case designs for some of their products. Their time locks as illustrated by examples A and B below were designed to be direct drop in replacements for the Yale company's model K22 and Triple K. Their movements were identical in dimensional characteristics to the Yale L-movements and were interchangeable with them. The case mounting holes were in identical locations between the company's product line.
A. A Kromer from the 1950's. Meant as a direct drop in replacement for the Yale model K22. file 26
B. A three movement Kromer from the 1950's in a case style and internal dog bolt mechanism very similar to the Yale Triple K. The height and width dimensions are identical but it is considerably less deep at 2.5" vs. 3.13" than the Yale due to the fact that Yale uses a much thicker and heavier anti-dynamite movement containment plate. This plate is supported by four springs from the rear of the plate as well as the front and these are secured by the four bolts seen in the corners of the time lock box in the second photo. The Yale also has a door hinge milled from the solid case shell as well as the door plate and pinned together, while the Kromer uses a butt hinge countersunk into the door and surface mounted to the case and held with screws very much like a conventional door hinge. It is overall less robust and of cheaper construction and presentation than the Yale counterpart. Note that all of the movements are stamped with the same number, so these are probably a model rather than a serial number. Case #3366, all movements #1161, 6.25"w x 4.25"w x 2.5"d. file 180
C. Star Safe Manufacturing Co, Paramount, California with Kromer movements, c. 1960. This is a Kromer lock licensed to the Star Safe company. This model has a special analog sector dial attachment labeled "Short Time Indicator" that shows the final four hours, see video. I have seen a few other of this model and none has this attachment. file 19
Below is a Kromer time lock in a Mosler safe door.