“NO-KE LOCK CO PORT CHESTER N.Y. PAT.O 07.” is stamped on the obverse of the shackle. 2 13/16″ high x 1 3/4″ wide. All brass. The patent information of “PAT.O 07.” stamped on the obverse of the shackle is curious. I have not seen a complete patent date on any padlocks as yet.Patent # 859614.