Here is the Bonehill I got with the 3 gun treasure. It's missing the safety parts, the forend wood and latch and buttplate. I have what's left of the barrels. They have been stubbed off and new tubes welded in. He rumaged around and handed me a metal buttplate that he said went with it but doesn't.
The action has cocking indicators. L of loaded, D for discharged, I'm guessing. The buttstock and forend iron does not have a serial number that I can find.
Odd that it looks like an old gun yet it has a patent date of 1952.