The brooch is in good condition. Measures 2 7/8 x 1 5/8 in. The piece could be an unsigned designer piece. The back has a seam that could have been there for possibly a duet model as well.
There is a Mazer brooch that has a remarkable resemblance. If I advertise a piece as gold or silver and it is unsigned or unmarked then it has been tested Finally, your feedback is important to us.