The scarce World War I locket button made by the Liberty Mfg. Co. of Los Angeles, CA. Shown BBB PL 277-10. This hinged button opens to reveal two celluloid protected spaces to hold pictures of the faraway loved ones. Backmark LIBERTY MFG. CO. LOS ANGELES. CAL. PATS. PEND. with brass loop shank. Est. selling price is $100-200.