I've had this lock and its key for about 40 years. I bought it at an
antique shop but still haven't learned whether it had a specific use.
I suppose it could have been locked into a groove on a rod to keep the
rod from being withdrawn out of something it was keeping closed until
the lock was removed. That's my best guess so far.
Anybody here know its real purpose?
If not for a pintle ring, it's probably something similar for railroad
use. Brass lever type locks with barrel keys are popular with railroads.
Not applicable to a Janney coupler but perhaps for switch gear or similar.
It definitely has the look of a railroad lock.
The hinged body of the OP's padlock would separate it from
all these examples of pancake locks .. and also from the 100's
of round vintage padlocks from my google image search ...
What is the size of the OPs padlock ?
I should have mentioned its size. It is 3-1/4" diameter and has no
lettering or other markings on it.
It may be a one of a kind prototype made by an toolmaker in a lock
Or maybe a thesis project for someone in locksmith school. <G>
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