Mills – Combination Lock. 4 1/8″ high x 1 5/16″ wide x 9/16″ deep. All aluminum construction. To unlock the lock you align the 3 dials to their correct position. “BAXTER” is stamped on the inside of the shackle. “M. B. Mills PAT’D FEB. 4 1879” is stamped on the reverse of the body. This is a rendering of Mortimer B. Mills Patent # 212036. We have not found a production example of this patent. 2018. Only 1 of these locks were made … 2018