Yugoslavia, Kingdom. An Army Air Service Observer's & Navigator's Badge, By Karnet-Kisely certificate_of_authenticity vertical needle pin with a

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

" (Gesetzlich Geschützt) and maker marked with the Christian Theodor Dicke Co

It was composed of 1

engraver marked "F VERNON" on the obverse

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 vertical needle pin with aSilver, 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.