Stamp WaA20

Stamp used to mark military elements, used:

- in 1941-45 by manufacturer Gustav Appel, Berlin-Spandau (manufacturer code: cnx)

- in 1938-41 by manufacturer Gustav Appel, Berlin-Spandau (Producer code: 64)

- in 1934-38 by manufacturer Gustav Appel, Berlin-Spandau.

- in 1942-44 by the manufacturer Braunschweigische Blechwarenfabrik, Braunschweig (Producer code: arr)