Cased Luftwaffe Flak Badge. Type Ball Hinge.

Tombak/brass based and in a very good, slightly worn condition with all of the silver plate still present and some patina.
Not marked but a known variation that is commonly referred to as the „Ball Hinge“ due to the characteristic hinge used.
The fitting case in a very good, slightly used condition. Embossed in gold on top of the lid with the designation „Flak Kampfabzeichen“.