Don, I think a "keeper's gun" might have been ordered FROM the estate owner's usual maker, but not likely BY that maker, if it was someone like Purdey or Boss. But I expect they certainly could have ordered in a basic boxlock made "in the trade" for a good customer--on which they would not have put their name. Then again, maybe it didn't work that way and the noble had to go elsewhere to find a keeper's gun.