My parents owned many pieces with this mark. They lived in the NYC metro area all their lives- from the 1930's onward. Much of it in Brooklyn. Might this offer a hint? I'm at a loss that nobody has any leads yet. TIA.
I have had this post and silver mark in mind for some time now. I identified it a few years ago but need to go through a large inventory to find the maker's name. I do remember that the key to this mystery is the small "L" above the lion. I will search my inventory and post my finding here.