Vintage Hallmarked 925 Pink Conch Shell Cameo Brooch/Pendant

Beautiful pink shell with a carved white young lady. Wear as a brooch or pendant. Shown on a chain for photographing - chain not included. Hallmarked and could be maker however I’m not able to decipher Hallmarks: 925 & something else - not legible for me Measurements: 1 1/2” length x 1” wide Condition: Beautiful vintage condition with no noted flaws