Thanks Jim, there's very little information on Grunlach lenses on the internet, most relevant links seem to point to you or Tim Atherton
Your comment about royalties actually raised some thoughts. I noticed a few posts about the f16 Grundlach EWA lens, all the Zeiss designs were f18 but the Ross equivalent was f16 and called an EWA.
Could you elaborate on how you percieve the sharpness differs with a modern Tessar design. You mention the Nikon I have one a 300mm f9 (use it on my 5x4) but I've always used the 12" Dagor that came on my first 10"x8" Agfa Ansco - I was told it had separation, the previous owner had never used it - actually it just had a huge build up of dirt around the rim of the front glass
My own perception of the Dagor (mine was factory coated after WWII) is it's a very tonal exceedingly sharp lens, a 10"x8" equivalent of a Summicron, unlike the wirey contrast of Japanese lenses.
Would you expect the Grundlach to be similar ?
Ian