For fun, I've come into possession of 5 rolls of Ektacolor Gold Professional 160. Expired in 1990. Box is in impeccable condition, seller claims it was cold-stored.
I'm wondering if anyone has suggestions on how I should rate the film's ISO when exposing it. I'm willing to burn a roll or two through experiments - there's every chance I'm burning all of them - but would love it if anyone has any tips to start!