Vintage Signed Mid Century Modernist Unique Sterling Silver Pendant 24 in. Necklace

Vintage Signed Mid Century Modernist Unique Sterling Silver Pendant 24 in. Necklace. This is one awesome piece! Solid .925 sterling silver, stamped and tested. Marked with what looks like a capital "L" with a smaller capital "L" upside down inside of it. I have researched this one for a year off and on, and cannot find out anything! I do know it is solid sterling, I do know it is mid century, I do know the chain is not original to the piece. The chain is a 24 inch Italian sterling silver box chain. It is perfect for the size and weight of the pendant. The pendant is quite large at just under 2 1/2 inches by 1/2 inch. It has what I like to call craters. Looks like the surface of the moon. It is very unique. It has a minimalist, modernistic look. Total weight is 13 grams. It is pre-owned, Vintage, in excellent condition, with just some very light superficial scratches, consistent with normal wear and age.