Quote Originally Posted by Jarvman View Post
Thank you kindly for the advice everybody! Appreciated! Will have to try the tray method as Ian suggested. I don't have either ID-11 or D76. Well actually, I think I have D76 but I'm not touching a whole pack just for one film. I do have HC-110, XTOL and Ilford DD-X handy.
If you don't have D76 available, Xtol yields very low fog. Use stock developer. I would try 10 minutes at 68 F / 20 C.
The key is to try to lift the exposed values above the accumulated fog, and few developers develop shadows like Xtol does.

More importantly - don't promise the film's owner anything results wise. There's always risk of unusable results from film this old, risk that is beyond your control.