Adox - discontinued products : http://www.adox.de/Photo/discontinued-products/
That old message from Fotoimpex was regarding CHS film. CMS20 is available - indeed I bought a roll of it yesterday from FotoImpex.
Regarding the OP's original question one simply needs to view the technical details of the image on Flickr. From this it is quite clear that there is no medium format, no exotic developer and no fancy scan behind the very low grain. It is simply that the photographer used a slow film (Rollei RPX 25 / 135) developed in a pretty standard developer (Kodak D76 1+1 for 8 minutes).
Bests,
David.
www.dsallen.de
.
