RENOIR Vintage buying Copper Musical Instrument "BALALAIKA". Book Piece.

THIS RENOIR SOLID COPPER BROOCH IS THE DESIGN STYLE CALLED BALALAIKA AFTER A RUSSIAN MUSICAL INSTRUMENT.
COPPER WITH ANODIZED ACCENT.
HALLMARK: COPYRIGHT SYMBOL AND "RENOIR" IN SCRIPT.
CONDITION: NO DAMAGE VERY LIGHT WEAR. SOME RED REFLECTIONS IN PHOTO FROM CAMERA. ONLY COLORS ARE COPPER AND BLACK ACCENT.
CLOSURE: WORKING ROLL-OVER LOCKING PIN buying CLASP
SIZE: LENGTH 2 3/4 INCHES AND 1 1/8 INCHES AT WIDEST.
THE BROOCH IS PICTURED ON PAGE 123 OF "COPPER ART JEWELRY: BY BURKHOLZ AND KAPLAN, 1992.