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Northwestern Barrel Lock; Patent Pending

c. 1932.. You've probably seen enough barrel locks to last a lifetime, but you may not have seen one like this. I hadn't. Every barrel lock I'd seen before this one has the patent information embossed on the back side of the lock. This was made before the patent number was assigned and has a bunch of extraneous markings (hence all the pictures). I don't know the significance of these other markings.