This Art Deco style gold-plated brass pin is a coil of ribbed beads with a long tail finished with a rattail chain tassel.
The brooch at its longest "tail" length is 4 1/2" but you can wrap the tail a bit to shorten height to 3 1/4" total. Width with "tail down" is 1 7/16" wide; with the tail wound a bit, one row of bead is added on the right.
The pin shaft has a safety clasp. There is a necklace bail on the back which drops out of sight when not in use. You can put a chain or ribbon of your choice through it to create a necklace--most likely you will still want to pin the brooch on, too, since the pin will show otherwise.
The filigree plate back is not signed. Condition is very fine.