03.08.2017, 22:50
Are you sure that the stickers are not different for side A and B on the same cassette in both cases? It would make more sense than inverting the black and yellow parts between 1973 and 76. Maybe the only difference between the two cassettes is the updated Sanyo logotype? I don't have a clue... never seen these cassettes in real life.
Cheers
Martin
Cheers
Martin