Those presses are closer, and very early for printing from plates.
The ones printing from stones were more like this one from
http://www.fotolibra.com/gallery/499...der-jobbing-m/
Making them wouldn't have taken long. Figuring an unlikely but for math convenient 10x10 sheet,
100cards x 1000 sheets an hour =100,000 cards/hour.
x10 hours of production /day = 1,000,000 cards/day.
Figure 10 colors counting the back, so they could easily turn out 100,000 a day, probably more if the sheet was bigger as was likely, or if they used more than one press.
Add in a couple days for cutting, and a million cards probably took around two weeks.
Steve B