Well I had around 12-15 years newer film then what you had Matt. I still have some Super XX in 4x5 I really should use up, as it too was fogged when I shot it over 15 years ago. That was dated in the 1970s. Ron Mowrey gave me this film in the early 2000s, bless his heart.
Im making a video on this whole process. I'll post the link when I have it uploaded.
Just wait until January... there's going to be a rush of royalty free recordings released for the first time in 20 years. This is a big deal... I'm getting out my pre-1923 78's
Very good results from those old films, Braxus and Kodachromeguy. Remember that the film was made a year or, most likely, two years before the exp. date, so that 120 roll would have been made in 1956 (or 1955 even).