Zinc based and in an excellent, unworn condition with all of the matt silver plate still present. The swastika and high points burnished.
Not marked but a known variation that, due to the shape of the hinge plate, is commonly referred to as the „Half Moon“. See Frank Heukemes, The General Assault Badge.
Nice condition example.

Zinc based and in a very good, barely worn condition with all of the silver plate still present. The swastika and high points burnished and all with some patina.
Not marked but a known variation that is commonly referred to as the „half moon“ due to the shape of the plate under the hinge. See GCA database.
Uncommon variant.