Picked this up at a small swap meet. The lock is marked Corbin G 478. I don't know of any old time locksmiths in my area. The cap is marked Schieber, would love to have it's mate and even just a blank for the lock. Bob at 903 824 1949.
There is a key listed on Ebay with that number. It is a old listing at $18.44 buy it now
The key will look like a padlock key about the size of a Master lock key. The letter on it- if it has one- will be G. Thanks for the help, Bob.