Posted By:
Steve MurrayI do own about 120 of the M101-2 issue.
To answer the main question they do appear on differing paper stock. Some are quite fragile while some are quite sturdy. Can't recall having compared the same player (though I do have many dupicates) to see whether there is any difference.
I am not aware of these having been reprinted and doubt that they have.
Because of the size there is no company that "authenticates" them nor slabs them.
In any event "authenticating" or "slabbing" would in most cases would not be cost efective as the commons run from $10 to $25 depending on condition. Now if you have a Cobb, Jackson, Johnson or the like that of course would be a different story.
Steve in Chicagoland