Hi,
I have in my position a very old combination lock. The front of the lock says "Clark Combination Lock Co." It was built in Baltimore, MD sometime in the 1870's. It it brass and lists three patent dates; Feb. 4, 1873, June 15, 1875 and a reissued date of Feb. 29, 1876.
I don't know the combination to it, but it appears to be a very early form of the combination lock.
Any help on identifying it and its value would be appreciated. Thanks