Thanks for the advice and for the info. Mark, don´t worry, I won´t use it for anything serious, but as a test (I have 4-5 rolls of it) I would be curious to see if anything comes out of it. It won´t be the first time that dated stock still reacts to light, specially if you know that these rolls have been stored properly for those 40 years. Another issue, most difficult to deal with is the lab processing. Maybe I will attempt to hand process it. I have some other stock in BW though I don´t have the specifications with me right now, I will try to post them to see what is your opinion. Thank you very much to all of you. Your replies have been damn perfect and informative.