VINTAGE SORORITY GOLD PIN with "S" & 35 TWO PIECE w/TINY CHAIN

Description

THIS IS A SORORITY PIN THAT COULD BE GOLD RATHER THAN GOLD PLATED, IT IS MARKED ON THE BACK BUT WITH THESE OLD EYES VERY HARD FOR ME TO SEE.
I CAN SEE AN "A & K" BUT THAT IS ABOUT ALL. IT LOOKS LIKE GOLD BUT I CANNOT BE SURE SO TO BE SAFE I WILL STATE IT IS AT LEASE GOLD PLATED.
THE MAIN PIECE HAS AN "S" SET IN BLUE ENAMEL IN A DIAMOND SHAPE. I ALSO THINK IN THE TOP CORNERS THERE IS A "G" AND OPPOSITE AN "S". THE GOLD FRAMING IS ALSO LAYERED. THEN THERE IS A TINY LINKED CHAIN THAT ATTACHES THE NUMBER "35".  BOTH PIECES HAVE SAFETY LOCKS.
IT MEASURES 2 1/4" LAID STRAIGHT by 1/2" WHICH IS THE LARGEST PIECE. THE "35" MEASURES BETWEEN 1/4" 1/2".
AFTERTHOUGHT ---- COULD THE G & S STAND FOR GIRL SCOUTS? I DID SOME RESEACH BUT GS DOES NOT SEEM TO HAVE THIS ELABORATE TYPE OF PIN.