Zinc based and apart from an old repair to the hook and the pin being replaced, in a good, worn condition.
Not marked but a known variation that has been attributed to the company of Friedrich Linden, Lüdenscheid (FLL).
Hook repaired, replaced pin(!).

Zinc based and in a very good, slightly worn condition. The wreath with lots of the silver plate still present and some oxidation. The eagle with most of the dark oxidized finish and attached to the wreath with two typical rivets.
Not marked but a known variation that has been attributed to the company of Friedrich Linden from Lüdenscheid (FLL). See Sebastian Talbot, The Luftwaffe Pilot and Combined Pilot and Observer Badges.

Zinc based and in a very good, slightly worn condition. The wreath with most of the typical silver plate and some patina. The eagle with practically all of the dark oxidised finish.
Not marked but a known variation that has been attributed to the company of Friedrich Linden from Lüdenscheid (FLL). Pattern with block hinge and round wire hook.

Zinc based and in a very good, slightly worn condition. The wreath with most of the typical silver plate and some patina. The eagle with practically all of the dark oxidised finish.
Not marked but a known variation that has been attributed to the company of Friedrich Linden from Lüdenscheid (FLL). Pattern with folded sheet metal hinge and flat wire hook.