Openwork Round & 1940s JMF Fisher 1/20 12K Lockets. 1/20 12K GF Chain Necklaces

Early mid-century oval 1-1/4" x 1" textured floral locket is stamped "1/20 JMF" on back. Inside will hold two 1" x 1/4" photos. The long 30.5" chain's spring clasp is stamped "120 - 12K". The ring on the opposite end of the chain is stamped, "1/20 12K G.F." & then what looks like "IV . S". The John M. Fisher company was in business between 1885 & 1949. The 1" round locker is an openwork floral motif cage that has been clamped around the inner frames, which hold two 5/8" photos. I don't see any marks or stamps on the locket itself. This locket opens from the top. The 22" chain's spring clasp is stamped, "1/20 12 K" The stamp on this clasp is fading out where the ring rubs along the center of the letters & numbers, so it takes a loupe & the right angle to make it all out. I don't see any "G.F.", so rather than being gold-filled, it's 1/20 12K gold. Both lockets snap shut & feel secure. I don't know the age of the round locket. Both appear to be in very nice condition.