The Tetenal Neodyn developers later became Neofin, although I don`t know what the differences between them were. Apart from TFX-2, Neofin Blue is the only Beutler type of developer that I know of that is currently available.
Paterson Acutol and FX-39 are described as high-definition developers, but whether they were/are of the Beutler type, I don`t know.
Wasn't it Neofyn Blau :D I remember trying some Tetenal developer that came in glass phials, there was a choice of Red or Blue. Tetenal kept changing distributors so it was hard finding their products at times in the UK.
Keith you actually high-light a major difference between European and US photography, it's there in the images made by European photographers in France & Germany particularly before WWII.
While it's there in history, in prints, collections etc it's also present in the developers, quite strange to us now but it was a different way or approach to working. This carries on after WWII where even Kodak are making & selling developers never seen or made in the US, and as PE (Ron Mowrey) has indicated unknown to US researchers).
Both approaches worked quite well though Ian. Both Europe and the US produced some fine photographers and fine photographs from the chemistry available. This shows what I have said over and over. There is no magic bullet. It is the guy behind the camera in virtually every case.
If you try to download the MSDS for Neofin Blue, you might find that you have to type Neofin Blau to find it, although it has been a while since I last searched for it.
I have found it and I hope this link works. http://www.tetenal.com/sidaopener_uk...auk/100126.pdf
It mentions Metol, Hydroquinone and Phenidone in the concentrate.
They happen to have made a fine line of color from the earliest days. I found that the only thing I didn't like about Agfa color film was the raw stock keeping which was not up to Kodak at the last I tested them both.
So, now the ball is in your court!