I found this can of what seems to be Agfa Copex Ortho Rapid. I couldn't find any info about it anywhere. What I know for sure is that this is older than 2004. Anybody has got any information about this film? Does it need special chemicals to develop?
To get a "good guess" starting time, take a piece of the film and drop it in your preferred developer and see how long it takes to turn black. Double that time as a starting point for development.
Expose a short strip at iso 6, 12, 25, 50, 80, 100 and develop that. That should give you an idea of the speed of the film, whether or not it's getting developed enough or too much, and what the fog situation is.