I am not sure about the 19 inch press track measurement. That might be the measurement for a proving press.
My research leads me to believe that a HOE NO.4 or HOE NO.5 flatbed stop cylinder lithographic press was likely used to produce the T cards. I found an article in an electrical engineering magazine from 1897 describing the new facility that ALC moved into after consolidation. This is approximately 12 years before production of the T206 cards. On the picture of the sixth floor layout posted below there are 30 lithographic presses. I believe the article mentions that this is one of three floors filled with presses. At the time a HOE NO.4 press would cost anywhere from 3000 to 5000 dollars. That would be a capital investment of 120,000 1897 dollars, That is very roughly about 3 and a half million dollars in todays money. (That is very much an approximation because the inflation calculator only goes back to 1914) the point being that I think that ALC would have squeezed every bit of use out those presses and to think that they would still be in functioning 12 to 15 years after installation is not beyond possibility.
The bed of the HOE presses is also posted in image 3. these dimensions lead me to believe that the sheets could have been much likely larger than you would think. The HOE No. 5 could use a 36x52 in stone or plate. Schmidt litho also used similar presses.
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