Vintage silver owl and greenstone pendant

Midcentury-ish, this is a heavy, cast silver owl with big googly green eyes of a stone, probably serpentine.  The owl is 1 3/4″ tall x wide at his ‘ears’ or head feathers and he weighs 38.2 grams.  The pendant hangs from a thick silver half loop on the back.  No marks but I guarantee it to be silver.