Original Inert German 7.92×57 Mauser Cartridge – P369 S 11 1938 – Teuto Metallwerke Brooke The 30×113mm round has been

The 30×113mm round has been in service since the 1970s and remains standard NATO helicopter armament

This authentic French 37 mm brass cartridge case

further enhancing its display appeal

it features concentric dials calibrated with the Zambretti algorithm—an ingeniously simple yet accurate formula combining barometric pressure and wind direction for short-range forecasts

including stamped markings

Original Inert German 7.92×57 Mauser Cartridge – P369 S 11 1938 – Teuto Metallwerke Brooke The 30×113mm round has beenAn original inert German 7. 9257mm Mauser cartridge bearing the P369 S 11 1938 headstamp. This is a genuine pre Second World War military cartridge manufactured during Germany's rapid rearmament programme for the Wehrmacht. The P369 manufacturer code identifies Teuto Metallwerke GmbH, Osnabrck, Germany. Teuto Metallwerke was one of the German military cartridge case manufacturers allocated a P code before the adoption of the later three letter factory