That appears to be MOA where mine is MIL...but either way, it still seems odd to start at 1.
Well Schmidt and Bender told me that it was 1/2 centimeter clicks at 100 meters, or approximately .20" at 100 meters, or .18" at 100 yards which is a very poor way to do a dial. This makes the 4 clicks between the numbers even more useless. Now I am not sure those Germans do the same way twice on anything they build because I have heard of so many different variations of the Precision Hunter including yours.
Now I have not shot this scope for 10 or more years and I have forgotten what it actually is and how I dealt with it but I plan to shoot it as soon as the wind dies down here to confirm the dial. I have never hunted it only shot it a few times at paper. My plan for it is to let a friend use the scope on a elk hunting trip in the fall so he and I will ring it out on his rifle.