I'm not sure if this was part of the Norman Bel Geddes Flow Motion jewelry collection. This piece dates to the 1950s.
There is a bend and associated break in the Silver finish I have tried to capture in the images. The roll over clasp is secure, the pin barb is a bit bent.
This unusual piece still looks wonderful and is a lovely example of American modernist design. Very Rare Silver Tone Abstact Pin Brooch Pin. Facing down, it almost an arrow pointing down. Pointing sideways it's a fish.