I posted a few days ago I found an exposed roll of GAF 500 B&W in a Vivitar ES rangefinder I bought on line. I usually develop expired film in HC 110, had none on hand so I mixed by last Diafine quart kit. I used 4 minuets rather than 3 to give part A more time to soak in if the emulsion had dried over the years. Base fog is present but not bad, appears to have shadow details. I don't have access to a scanner to post a few frames, I will print in the next few weeks. GAF 500 was not my favorite film when it was made, don't know how well it will print. Too bad Diafine is now $50.00. I might try divided D 76.