vintage BF & Co ART NOUVEAU NECKLACE - but kinda AS IS

Sorry, not my greatest photos. BF & Co Art Nouveau necklace. Center piece is wonderful; the "as is" part is that clearly some length is gone. Piece measures just 6 5/8" on each side from back clasp to side links of the central piece. Only good news is that what's here obviously part of the original. It has a filagree sterling box clasp which is probably not original---pretty light for such a heavy piece.