Rare 1907 antique S.O.B or Bigney twist bangle bracelet with engraved letters

This is an antique rare 1907 Bigney bracelet often seen in this style with filigree work and initials on them or sometimes without, rare to see one with the twist opening such as this, and the purple simulated faceted amethyst stones. Clasp easily locks into place. The small pin to unlatch is in tact firmly and requires a good amount of push to unlock it, no worries about it being bumped and jumping off your wrist. Signed on back S.O. Bigney & Co. and opposite side it says Pat. jan22 Feb 5.07. It is in need of repair as shown, a bit of soldering back together. If repaired it will be a lovely piece for any collection.