

I’m looking for any information on the Mosler “SMDR” time-delay lock. For example production dates (just looking at it, appears to be 1950s), what key blank might fit, etc. The back does not include a patent number (merely pending) and I haven’t run across a patent that looks like it.
It isn’t mentioned in any of the literature I’ve collected, and is not mentioned in the Mosler maintenance CD-ROM.
This appears to be a predecessor to the “Defender” which is much smaller (and one movement).
Jim