Vintage Ballou Gold Filled Baby Locket Necklace

Small vintage gold filled locket is signed 1/20 12K GF and a B inside a star and features an etched flower.  It measures 3/4 inch, including the bail, by 1/2 inch wide and it is on a 15 inch gold filled chain.  The weight of the necklace is 2 grams and it is in great vintage condition.