Unissued Original German WWII Kriegsmarine Medical NCO's Career Sleeve Insignia

Unissued Original German WWII Medical NCO's Career Sleeve Insignia-The insignia consists of a vertically oval, deep navy-blue wool base with machine embroidered dual, caduceus (serpent intertwined on a staff)-- which is machine embroidered. Cloth backing is intact. Please note there are 2 small holes on the right side towards the top of the patch.