I wouldn't say it was ordinary. I just missed your post. Looks like a Brother's Kelber script "L" near the forend hanger. Can you pleasure us with an image there. Proof date of February 1936. Upper run tube steel and there looks to be a worn mark at the end of the Bhler Antinit steel stamp. Typical D on lower tube, seen on underside of right tube on doubles, near a single S at the forend hanger.

Kind Regards,

Raimey
rse