The early stoves did not have the Coal Trol digital thermostat, but this can be purchased and added to the early stoves.. Prior to the Coal Trol, the stove had an adjustable stroke for the coal-feed shovel or pusher, and it had a reostat to control fan speeds..
I have opperated an early stove, and it is quite simple,, set the combustion fan on full speed, adjust the distribution blower fan to your desired speed and volume and use the stoker adjustment to increase or decrease the amount of coal fire on the grate, which adjusts the heat output.. It's all manual,, but very easy to get used to, and easy to control..
Hope this helps..