Bidspirit auction | Art Deco Platinum Sapphire and

Art Deco Platinum Sapphire and Diamond Bar Pin - Circa 1925 with old mine cut diamonds, and synthetic sapphires. The pin is marked 21/57 not sure what the numbers mean. Acid tested Platinum pin with a 14K gold pin stem. Measures 2.5inches x 4mm wide. .65pts t.w. in diamonds, Clarity SI1 and color H-I. Weighs 3.5dwt   Provenance: From a local estate. Condition: Good with Expected wear. Measurements and opinions on gems are approximated as they are examined and measured within the setting.