Quote Originally Posted by RGS122 View Post
Thanks for the replies, so that means that if I shoot it at say 400, do I still have my lab process it at 1600, or at 400? Also I have 4 rolls of this film to experiment with. I won't worry because I know that Fuji still makes this type of film.
It means that you have no idea what the film's speed is until you test it by shooting it at multiple EI's and dev normal. If you discover that the film's speed is 400 due to a loss of a couple stops from age than you would either expose the rest of what you have at 400 developed normal or increase or decrease the EI and adjust development accordingly.

Does this make sense?