ECC86 / 6GM8 Philips Heerlen (factory code ⊿ tN=ECC86) NOS
built in 1960s with Dimple-Disc Getter; no print marks - factory code only
spot checks show date codes 2D3 = March 1962 and 5E3 = May 1965 as seen on product pictures as examples
used in the primal Brocksieper EARMAX
does replace and upgrade the russian 6H27n
various brands, not necessarily identical to picture
