Probably my Star Scandinavian Jail Lock. This is an early one that had five steel discs, instead of the newer ones with five brass discs, or the newest ones with seven brass discs. Handmade a key for it. I'd have to check, but as I recall, the steel disc ones are from 126 to 175 years old.

Gordon
Just when you finally think you have learned it all, that is when you learn that you don't know anything yet.