Hard to find goldtone black and yellow plique-a-jour butterfly brooch with security clasp. Marked "Napier." Measures: 1 1/4 inches long by 1 5/8 inches wide. Excellent condition. An identical brooch was featured in a c1971 advertisement (see the top left- it's partially cut off) and a 1970 advertisement. The original retail price was $5, which is equivalent to about $44 today.