With the plethora of auction catalogues offering cabinets throughout the years, it's likely that more than a few would have been offered from the Conlon lens.
To the issue of the lithography process, I've read some of Ted Z.'s old archived threads. I'm still curious about many things that might not be unique to just T206s, but maybe to the era at large. Silkscreening, color-processes and drying techniques were so incredibly durable in those days. Even thinner paper stock, such as the T213-1 cards, still hold their color ink with incredible durability.
I'd love to see a portrait today manipulated and printed with the same old equipment and technique. I think that would be a fascinating process to witness.
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