Book Reference: Duette is featured in Brunialti's book "American Costume Jewelry A-M" on page 98. Condition: Enameling is in very good condition with only some tiny nicks. Rhinestones are still sparkling but there are a few stones that have darkened/aged (please see photos), and there is one tiny stone missing from yellow flower. Finish is in overall good condition but there is some light wear/loss on the backside.Clip is in perfect working order. This fur clip was once part of a Coro Duette. Measurement Approx: Fur Clip 3 3/8 x 1 1/4. Thank you for visiting Secondhand Bijoux! Items come from a non-smoking environment.