Quote:
Originally Posted by RCMcKenzie
"A little learning is a dangerous thing. Drink deep or taste not the Pierian spring."
Here's a 78 Topps Bartkowski, a T213-3 Matty, and a Buchner at 1200 dpi. The OP could buy a Buchner and compare it to what he has under a magnifying glass. It may not be definitive, but it's better than nothing.
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That's basically the three generations of lithography right there.
Buchner - essentially hand done stippling for everything. If there's a dot pattern, it's almost entirely random. Fairly transparent solid colors for mixing.
T206 - A bit of a hybrid. Modern style halftone in black, but with backgrounds that are mostly the same as the earlier style. The modern halftone would have been generated photographically with a screen. Most use more than 6 colors
78 Topps - Nearly all halftone, generated photographically using color filters. Only four colors, CMYK and a finer tighter screen than they used in 1910. A few solid areas, mostly borders etc. But those are done on the same negative as the original screen.
Newer stuff will have screening that's even finer, but it's essentially the same.
There's subtle stuff you can't see well if at all in scans, like how thick/thin the ink lays on the paper, or which layers are over what other layers. Sometimes that's even hard to tell in person.