Yugoslavia, Kingdom. An Army Air Service Observer's & Navigator's Badge, By Karnet-Kisely certificate_of_authenticity holding the rank of Oberfeldwebel

holding the rank of Oberfeldwebel (Master Sergeant)

three with crossed bronze swords clasps

Footnote: Gordon William Berry was born on October 31

vertical needle pin with a sheet metal hinge and a round wire catch

the battalion was transferred to the Military Command in France

Yugoslavia, Kingdom. An Army Air Service Observer's & Navigator's Badge, By Karnet-Kisely certificate_of_authenticity holding the rank of OberfeldwebelSilver, marked "900" (silver), maker marked "KK" (by Czechoslovak manufacturer Karnet Kisely) and with very low number stamped "15" on the reverse, 50. 3 mm x 66. 3 mm, dual screw backs (one retaining nut missing), light contact and surface wear, very fine. A scarce badge.