Repetition Clasp 1939 to the Iron Cross 2nd Class 1914 on Screwback. Type Boerger/Schickle.

Tombak/brass based and in a very good,slightly worn condition with practically all of the silver plate still present and some patina.
Not marked but a known variation that was attributed to the company of Börger & Co., Berlin but this has now been revised and now attributed to Otto Schickle from Pforzheim. See GCA thread

https://www.germancombatawards.com/thread.php?postid=371374#post371374

The reverse with screwback and mounted on a piece of Iron Cross 2nd Class ribbon.
A very rare variant of the 2nd Class clasp. Probably the most difficult to find at all.