1972 Topps - Errors and/or Variations

[kevinh1919]

I have some questions about errors and/or variations from the 1972 Topps baseball set. My presumption is that these are to be considered errors.

I am aware of the following:

18 - Juan Pizarro (yellow under C and S and also different cards with green under C and S)

29 - Bill Bonham (yellow under C and S and also different cards with green under C and S)

45 - Blenn Beckert (yellow under C and S and also different cards with green under C and S)

117 - Cleo James (yellow under C and S and also different cards with green under C and S)

Why is it that the yellow/green variation was only applied to these four Cubs players? There are other Cubs players in the set, yet they do not have a version of the variation. Also, why only the Cubs? I don't believe any other teams have it. Your thoughts - are the above to be considered variations or errors?

I have seen blackless cards with blank backs. I'm guessing the blank backs are due to lack of black ink.

I have also seen cards that look to have had their color applied twice, but the alignment of the multiple colorings was off the mark.

There is also a checklist that has the copyright in different locations on the back - 604. One has the copyright on the bottom right and the other on the bottom left. My presumption is that this was done in error. Would you agree?

Are you aware of any other errors and/or variations in the set?