I can’t give you a whole lot of help, but I can tell you that it’s probably not military, being that it’s a simple warded lock and more of a novelty or low security lock. Being as how it has a longer shackle, I’m thinking it might be for a bicycle lock. I would think the year of manufacture would be somewhere between 1930- 1960, but that’s just a guess. Do you have the key for the lock? Nice looking padlock none the less. Mark