I'm reading Tal's great book "Tal - Botvinnik, 1960" right now. He does an excellent job in his annotations and even writes down how much time each player had after each move. However, I don't see a description of the actual time control anywhere.
Did the players have a certain amount of time to reach move 30? 40? 60?
I assume this is the pre-increment era, seeing as Fischer created the concept. But did they have delay of some sort on analog clocks?
When could adjournments be called?