I love the look of Panatomic X. It was one of my two favorite B&W films when I was shooting alot back in the 1970s.The other was Tri-X. In my experience Panatomic X is virtually unexpirable. Several years ago I shot a few rolls that were found in my Aunts attic marked 1962. They were probably there in the attic for most of that time. Shot them at box speed and it was fine. I am no expert like a lot of folks here but my eyes could see the difference next to newer/modern Panatomic X stored properly. I had another experience where a friend bought a property with an abandoned farmhouse on it, had been vacant for 15 or so years. He called me when he found a complete darkroom in the place. It was a total shambles, everything was moldy, stacks of Agfa print paper wet and moldy. The enlarger stuff growing on it so sad
. There were two exposed rolls of Verichrome Pan that were in their little plastic containers that were OK. I processed them and they were fine.
The one gem to be found was a still sealed bulk roll of Panatomic X dated 1972. I put it in a loader and spooled up a couple 12 exp rolls, shot and processed them . . they were fine. Gave the loader and the Pan x in it to a friend who shoots a lot more 35mm than I did at the time.