[atx840]

It's likely the vertical columns could be comprised of two, three or all one card stacked. This could explain why certain players are found more readily then others with the same back. The exclusive 12 (Ford, McGraw, Crandall etc).

We know 34 is a number that is very consistent throughout the set, especially in the 460 series (it's not as obvious due to sub groups but very much there in all 460 backs).

The yellow brown scraps, only 34 different cards are known, 2-4 examples of each which fits the stacked column theory.

All 34 of these cards are grouped on their own throughout the 460 backs (they are the same grouping* as the BL460 subset) and likely comprise of one sheet layout....only one sheet was saved at this early printing stage.

This sheet would have been used for many different backs in combination with other 34 card sheets. Some a group of 28 plus the super prints, a few cards were switched out later on...making it difficult to see a pattern but its there.

*at some point Ames was swapped with Dougherty in the y/b sheet example.