King Neptune Sterling Silver Charm Bracelet Pendant Merman

Vintage King Neptune USA Sterling Silver Charm or Pendant. Measures 1 inch high x 3/4 inch wide and weighs 2.8 grams. Marked 925 with maker Hallmark off to the side that I can't quite make out. Overall in very good condition - only one I have from my private stash - not new import chinese silver - real sterling vintage charm