Back when steel was legal for Maine black bears I ran into a guy at a Pennsylvania trapping rendezvous that was making a 4 coil trap. I ordered one and picked it up on my way to the North woods for a bear trapping trip. Caught a few bears with it before they were outlawed.
I am trying to find the trap maker. Pan is stamped with a B. I remember his name being something like Boreli. He had a forge and shop somewhere in central Maine. Anyone familiar?
I would post a picture but it is currently in pieces undergoing a renovation and paint job.