Great pic there, Mike. Who is the manufacturer of that film? Does it say?
In looking at the stamped date, the last number (that is visible) of the year, looks like a 4, to me. It looks to be stamped slightly lower than the 9. Going on with what you said that the box may not be orginal to the roll of film.
Also, when you unroll the film and look at the perforated edge, do you see either the word "safety" (or "nitrate") printed along that edge?