It was some old Konica SXG 100 that I rated at 25.
I must admit that I was rather surprised by the results. I was expecting to see lots of fog and mud, but there was none of it. Also, the base of the film is not orange but pink, something that gave a hard time to my cheap scanner as it didn't know what to think. On the negative, there are a lot of deep magenta and bright cyan areas, not a common thing either.
I'm lucky to have filled my freezer years ago before prices became insane like today. For doing color, it might be worth getting a bulk of movie film and spooling from that.
Kai: You might want to look into a company called Flic Film. They are located in Alberta and re-spool movie film. The big difference with Cinestill is that they don't remove the remjet on the film. They carry their 100 ISO film at Fotoimpex (around 16 euro).