Quote Originally Posted by nickmannnxx View Post
That padlock is awesome. I just started getting into Corbin master ring cylinders and was trying to find who else manufactured similar locks. Thanks for posting.
AFAIK Sargent is the only other besides Corbin that made such cylinders. I started collecting around 1983 or so, and I just discovered last year that somebody besides P&F Corbin produced cylinders like this in the early days of pin tumbler locks. Apparently Sargent was quite innovative in the very early 1900's with oddities such as square pin cylinders and the duplex locks, but not too much later it seems they were all discontinued.