Late War "KRIM" Shield

Shield is made of stamped nonmagnetic metal with no backing. Has three sets of two prongs each on the back for punching through the wool on tunic sleeve and thin bending the prongs for mounting, the prongs are heavy duty. This is the first time I have ever seen anything like this, if I had not gotten two of them from vets family with other nice all original items, I would never believe them. Anyone have any info on this. Overall the bronze finish is getting weak, the detail is fine. Exc. + $225.00