Help identifying unknown mark LV on 925 Silver necklace

[Dsneed0903]

Hello, I have a unique piece of jewelry that I am attempting to identify the date of production. It is a 40" weaved silver necklace with fossilized wooly mammoth ivory plates. The clasp is stamped AG925 and the makers mark is what looks like a trowel followed by LV. I cant seem to find this mark anywhere. The silver looks quite old, but I would like more i formation on the piece if I can find it. Any help would be greatly appreciated. Thanks in advance.