the Carl Zeiss optics firm of Jena developed specific protective flight goggles that became the standard pattern for other manufacturers
this badge is published in newly printed book on the subject
ranging from near fine to better than very fine
MVO - In silver gilt and enamels
Austria, I Republic. A Gendarmerie Radio Operator’s Badge, By L. Klein, C.1923 Auction the Carl Zeiss optics firm(Gendarmerie Funker Abzeichen). Constructed of gilded bronze with multi coloured enamels, the obverse with a central Austrian style national eagle bearing a shield with national colours, inside a red and black enameled diamond, topped by white and gilt enameled inscription GENDARMERIE FUNKER (GENDARMERIE RADIO OPERATOR), with green enameled oak leaf branches at the bottom, the reverse with dual attachment clips, maker marked L. Klein, Wien, measuring