I just found some exposed film. I bought a handful of expired film a few days ago, 120, 620, 127 and 110, but I noticed two of the rolls were exposed when I got them home. I semi-stand developed them in Rodinal 1-100 for 1 hour. The roll of 120 film was in pretty good shape but the 620 roll has some deterioration. I'm not sure what brand this film was but judging by the date of the other film it probably expired around 1970 or earlier. Here's a picture from each roll.