Zinc based and in a very good, slightly worn condition. The wreath with practically all of the typical silverplate. The eagle with most of the dark oxidised 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, Lüdenscheid (FLL). Type with folded sheet metal hinge and flat wire stock hook. See Sebastian Talbot, The Luftwaffe Pilot Badges.

Tombak/brass based and, apart from the eagle being replaced with a casting(!) of a Juncker type eagle, in a good, worn condition.
Not marked but a known variation that has been attributed to the company of Friedrich Linden, Lüdenscheid (FLL).
Interesting repair.

Zinc based and in a very good, slightly worn condition. The wreath with most of the silver plate still present and some patina. The eagle with practically all of the dark oxidised 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, Lüdenscheid (FLL). See Sebastian Talbot, The Pilot Badges.