You can Google "Neopan SS" and see what pops up. A wonderful film, in its time it was often called the poor man's FP4. Grainy if not correctly processed. I used it extensively during Southeast Asian visits in the 1990s and in 2000 I did an entire New Mexico and Arizona shoot with it, but found it tended to bleach the highlights a bit in super bright sun, watch out for this. After my US trip I didn't see a roll of it sold for 14 years, then in 2014 a photographer in Singapore sold me 100 rolls of it at a ridiculously low price, and gave me a 100-foot can of it! possibly from a very early Fuji batch, 1970s or 1980s. I now control the global SS supply, I think! I haven't opened the 100-foot can, but occasionally use a few rolls for general shooting. I would buy more if it was available, but I think Fuji no longer manufactures it.
I find it shoots well at box speed (ISO 100) and processed in my Jobo, benefits from the usual -15% reduction in development time.
I recall the late Barry Thornton wrote a detailed article about SS, may still be available on his web site. Fuji also published a data sheet on it, I have it but couldn't find it, sorry. Check the Fuji web site.