Kriegsmarine Anti-Aircraft Range Finder Operator NCO's Career Sleeve Insignia

Kriegsmarine Anti-Aircraft Range Finder Operator NCO's Career Sleeve Insignia (Entfernungsmesser mit Uffz.-Lehrgang Laufbahnabzeichen). On entering Kriegsmarine service all personnel were assigned and trained for a specific career. Oval navy blue wool base showing a machine-embroiderd range finder above 2 chevrons. Nice original arm-badge in very good condition!