14k yellow gold diamond fern spray brooch pin 1950s USA

An 14k yellow gold diamond spray brooch in the shape of a group of long leaves, three at the back and three at the front, set with 50 single cut diamonds and with a single pin fitting with a rollover clasp - unmarked apart from 14k - total diamond weight 50=0.70cts G-J/SI - total weight 18.35grms - overall dimensions 73 x 57mm c.1950 USA