EF86, MULLARD, MESH SCREEN, FACTORY CODE, 9r3 D5c5, HEERLEN, MARCH 1965 MANUFACTURE

 EF86, MULLARD, MESH SCREEN,  FACTORY CODE, 9r3 D5c5, HEERLEN,  MARCH 1965 MANUFACTURE

On offer today one of these striking devices. with a mesh screen around the anode plate and rigid internal support.