Corbin lockset with porcelain door knobs. Pat 1870

I just pulled out of the old shed that's in the backyard. Here is a little info on it:

Original Antique Rim (Box) Locks After 1865

By the mid 1860's the basic rim lock was being made as it would remain for the next century. Companies continued to work on improving the working of the lock mechanisms mainly by removing as many unnecessary parts as possible. The rim lock remained the backbone of the lock industry and is still the hardiest lock ever made.

A little more history about these locks and how to add antique locks to your Victorian.