What is the bike in the background?
Sheared turret screws are common too, throughout the whole range. But save yourself a whole LOT of bother with stripped segment cover screw threads. Just re-tap and use 7BA screws. This was an approved repair by us.
Skewed turrets - or do you mean skewed index plates? Done so that the clicker plate allows the clicker plunger to click-in at the exact point on the range scale in relation to the index mark. Occasionally you'll also see the little index mark well over to one side too. That is the reason why the triangular marker is on a separate nickel plate, to allow for adjustment.