Stamp WaA220

Stamp used to mark military elements:

- in 1935 by the manufacturer Gebr. Heller, Marienthal (Th), (Producer code: S/178)

- in 1935 by the manufacturer Gebr. Heller, Marienthal (Manufacturer code: S/178G)

- in 1943-44 by the manufacturer Kontaktwerk Josef Bühler, Freiburg (BW) (Manufacturer code: cxk)