2 dials. Campaign turns, Vitality/Reserve points.
The dial displaying the campaign map is perfect for keeping track of campaign turns, without having to write them down on the campaign sheet.
The other dial will be used to keep track of a Leader's Vitality points, or those of other large and huge creatures you may be facing (giants, great demons, dragons...). You can even use it to count the Reserve points (the counter marks up to 100 points).