Antique hand enameled gold tone brooch

this is a very old hand enameled antique gold tone multi colored high quality crystals . this is signed on the back by the designer but I don't know much more than the big 7 makers so you can see the makers mark in the pictures this one looks like L/N to me if you know better I'm glad I wish I did. the condition of this colorful beautiful brooch is amazing for the age as I was told it is probably from the early 1900s.