First a couple of reservist crosses, one in brass (left) and the other silver. I believe the brass which has 4 prongs on the back to be from a Landweher type wappen. The other silver has 2 prongs which suggest being fastened to the tail of the infantry eagle.
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Left...Garde M15 shako wappen. Right M15 JzP/Dragoner wappen
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Left...Garde M15 shako wappen. Right M15 JzP/Dragoner wappen