United States. An Army Air Force Pilot Badge, Reduced Size, C.1941 Hold Marked K on the bottom

Marked K on the bottom arm

you have been Collector of the very large and important district of Gorakhpur with over three million inhabitants

used for instructional purposes in July 1917

By this time Heberlein was part of the OKW Ausland / Abwehr I Außendienststelle Belzig (Mark) (Supreme Army Command’s foreign / defense authority

The book used to belong to a soldier called Max Marbach

United States. An Army Air Force Pilot Badge, Reduced Size, C.1941 Hold Marked K on the bottomIn sterling silver, hand engraved "To Sweetie AL" and marked "STERLING" on the reverse, measuring 51. 5 mm (w) x 15. 5 mm (h), horizontal pinback, dark patina, very light contact, near extremely fine.