Carl Ove Frydensberg was a Danish silver maker registered in Copenhagen, Denmark from 1949 - 1982.
I think this lovely little brooch dates to the 1950s.
In 830 silver.
The pin has a c clasp, upon which is stamped COF 830S
In generally good vintage condition, with some tarnishing. The central ball is free of dents. The pin is fairly straight and closes securely.