Offizierstellvertreter

Offiziersstellvertereter, short OStv (en: Officer deputy), is a rank of the higher non-commissioned officers rank group (also staff NCO group) in the Austrian Bundesheer and Imperial German Army.

Ranks of the Austrian Bundesheer

In 1915 the position Offiziersstellvertreter was introduced to the Austro-Hungarian armed forces, at the time being not as rank, but as an assignment. It was the intension to equalise the high number of World War I losses. Promoted were staff NCOs (Stabsfeldwebel, Stabswachtmeister, Stabsfeuerwerker, and/or Stabsoberjäger) who did have the appropriate rank at least for one month. Together with the staff NCOs the Offiziersstellvertreter formed the rank group of higher NCOs (de: higher Unteroffiziere).

Rank insignias of the Austro-Hungarian armed forces

The rank was created in the Imperial German Army in 1887.

...
Wikipedia