Amazing Enameled Sterling Silver WWI US Air Service Observer 1/2 Wing in Miniature Size

This is a Amazing Enameled Sterling Silver World War I US Air Service Observer 1/2 Wing in Miniature Lapel / Overseas / Sweetheart Wing. Unmarked, but Possibly by BB & B or Robbins. Only One I've seen, Ex-Duncan Campbell Collection.

Circa World War I.

Approximately 3/4" x 1/4".

Sterling silver with enamel.

Horizontal pin with drop in locking catch.

STERLING

 This is from a United States Army Air Forces collection which we will be listing more of over the next few months. VAJJX09 LFGEX08/24/19 SFEJM10/22/19

8+ (Excellent): The wing has only some very light wear.

As with all my artifacts, this piece is guaranteed to be original, as described.