The earliest timetables in the collection, dating from 1906 and 1914, are formatted more like staff timetables, the pretty cover on the latter being the only thing suggesting that they were actually published (well, aside from the metadata, obviously). Each train gets its own table, with scheduled max speeds listed in the header, all passed stations are listed with times, and separate columns for arrival time, duration of stop (if any), departure time (looking quite similar to that board at Tiraspol Jon photographed) and trains met (not sure what the last column represents - it seems to be minutes of some kind, but it doesn't seem to always correspond to the time taken between stations, exactly). Freight trains are also included, as well things like a table of gradients and bell codes used by signallers (I think). There are also no ads.
An example - One of the first pages of the April/May (Romania was still on the Julian calendar and the validity date was given in both Julian and Gregorian) 1914 timetable, showing a "tren fulger" (lightning train), a category apparently soon discontinued, from Vârciorova (at the time the border crossing with Hungary on the line via Craiova to Timișoara) to Bucharest. It reached top speeds of 70 km/h, except for the Turnu Severin-Balota section, where it did 45 km/h. Most of the route (via Pitești and Piatra Olt, the modern route via Roșiori and Caracal didn't exist yet) isn't much or any faster today, including the aforementioned slow, incredibly curvy, section.
https://timetableworld.com/ttw-viewer.php?token=60a47f53-e611-486c-8162-d11914a9f68c
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