Tombak/brass based and in a very good, slightly worn condition with lots of the gilt plate still present and some patina.
Not marked but a known variation that has been attributed to the company of C.E. Juncker, Berlin.
Uncommon variant.

In a very good, slightly worn condition with lots of the gilt plate still present.
Not marked but a known variation that has been attributed to the company of C.E. Juncker, Berlin. See GCA database.
Uncommon badge.

Zinc based and, apart from missing the hinge and hook, in a good, worn condition, the finish mostly faded.
Not marked but a known variation that has been attributed to the company of C.E. Juncker, Berlin. See Weber/Skora, The War Badges of the Kriegsmarine.