Tolstoi’s agree seem to be the most available, Old Mill and Sweet Cap are there too. I’ve had a few EPDG’s along with a few Piedmonts and Cycles. I’ve seen some Polar Bears too that look really cool in other folks collections.
For me I don’t think this is a storage thing. It just doesn’t make sense to me. If this ink under the right set of circumstances was so quick to bleed off onto the front of the cards. Then it would be safe to reason we would have just as many front images of players showing up on backs in rough outlines, as we do ghostly outlines of advertising brands on the fronts. Yet we don’t….
Heat, humidity etc. can do some crazy stuff to cards no doubt. However based upon personal experience I haven’t seen this storage transfer in my experience. I’ve been lucky enough over the years to find lots of t-cards including large finds of T206’s in all shapes and forms. I’ve pulled them from hot attics in the Deep South, trunks in basements, musty old barns to damp antique shops…ahhh those were the days. I spent a lot of time in my youth cherry picking cards for my collection and remember sorting through all sorts of stacks of cards. Occasionally you would find one or two like the above but for the most part it was an oddity.
If it’s happening from storage it must be a special set of just the right circumstances for this to occur. For me I’ve seen my fair share of different circumstances/conditions yet they never really yielded any large grouping of the above.
I think the more obvious is more likely the cause of these, stacked sheets fresh from printing at different stages of dampness in terms of the sheet coming off the press.
Just my two cents.
Cheers,
John