The PSA Type System: Should it follow the photography market?

[sphere and ash]

As someone with a highly educated opinion, I would like to draw you out on the question at hand: does the PSA Type 1 definition improve or impair the definition used in the larger photography market?

Originally Posted by prewarsports

Conlon used different paper sizes and types throughout his career and as far as I know, those are not used in dating.

I think the use of various papers is consistent with Conlon frequently not doing his own printing. Also, when a third party is printing for halftone reproduction, the choice of paper barely matters. Whatever is there will suffice.

Originally Posted by prewarsports

I have also seen his earlier stamps re-used on later paper making a definitive dating even more difficult. I tried for a few years to make a catalog of these for more accurate dating, but he made it pretty difficult!

Are you saying that Conlon would use a stamp for 111th St. while living at, say, 118th St.? If so, I would love to see an example.