While I’m no expert on padlocks these are rather odd. I’ve never seen a lock of this pattern made by Yale before. Do you have a key ? If so is it marked ?
It’s quite possible that the locks would have been made specially but somehow I doubt that Colt would have used such a lock as their shipments would have relied on armed guards rather than padlocks ?
Have you seen if Colts have a company historian who maybe able to assist ?
At the moment my gut feeling is that they are a fantasy item of some kind - although I could be wrong and am sure someone more knowledgeable than I will comment in due course.