All this is well and good regarding the visual,,,but as for the audio..none of us have M or M- hearing.
In fact some are downright struggling at our age .
M ,,,,sucks on the company sleeve,leaving static dust on the vinyl /styrene.Unplayed.Label as leaving factory.
M-,,,,As above then..played a couple of times to verify clarity and no vinyl blips etc.Label as above.