Zinc based and in a very good, slightly worn condition with most of the silver plate still present and some patina.
Not marked but a known variation that has been attributed to the company of Alois Rettenmaier, Schwäbisch Gmünd. Also commonly referred to as
the“Flat Back“. See Philippe de Bock, The German Panzer Assault Badge.
Nice example.

Zinc based and, apart from the hook being repaired(!), in a good, worn condition.
Not marked but a known variation that has been attributed to the company of Alois Rettenmaier, Schwäbisch Gmünd. See Philippe de Bock, The German Panzer Assault Badge