Help with hall mark "LH" - silver stampwork / overlay cuff

Hello, I searched through all the publications I got and the Internet as well but so fa have not been able to identify the silversmith who made this sterling cuff and how old it might be .
I suppose it is Navajo but am not 100 % positive. The hallmark is “LH”. From the “L” little jagged peaks are standing out. It is pretty distinctive but the pictures are not so great.
Thanks for your help