Vintage Flying Bird Brooch Sterling by Beau, seagull or swallow

MEASUREMENTS: about 2 inches wing tip to wing tip
LABEL: marked 'Beau Sterling'
Sterling silver brooch of a flying bird, I've seen it described as a swallow, or a seagull. Locking C closure on the back.
CONDITION: Very good condition. Has some light wear and tarnish and a few small dark spots. Needs to be polished.