WWII German Kriegsmarine Chevron

WWII German Kriegsmarine Chevron-This is produced in dark blue badge cloth. There is a bright golden yellow tresse 'V'. This is for a Gefreiter or a Corporal rank. This is very clean, with no nips or tracking. Someone has written 4-5 on the reverse, this is very light, and we are uncertain of this purpose. Overall very good.