[Steiner]

I recently aquired what I believe to be a grade 1 flues 28 gauge. Lovely little gun. Barrels appear recently reblued (maybe not professionally) I'm looking for clarification on the markings or a potential reference site. #369437 on the appropriate places I think. Also an 8 and S stamped on barrel lugs, an L near the serial number, 4 on each flat, L above 28 on water table and same way on forend metal with serial number. ( If I wasn't incompetent I'd add the pics I took)