For Comment: This shot was made Tuesday of this week using a film that today is lable 400TX. The label on the version I used read Tri-X pan 400, what we just called Tri-X when I was just a kid. I am not sure when I acquired this film but I have had in the frig a long time. It expired in September 1988. The rule I was taught, with expired film, was that you halved the ASA ( today ISO) for every 10 years past the expiration date. Which theoretically would lower the ASA of this roll to less that 50. However, I was going to develop it in Diafine which is very unique developer in that it esentially compensates for whatever film speed you use. So with my fingers crossed I shot the roll at box speed, ASA 400.