You just need to look at the turrets and the reticle.
The turrets should say something along the lines of the following
For mil turrets: .1 mil, .1 mrad, 1 cm at 100 meters, 0.5cm at 100 meters etc. Basically if they say anything about mils, mrads or cm you're dealing with mils.
For moa turrets: .25 moa, 0.125 moa, 1/4" at 100 yards, 1/3" at 100 yards. If you see anything about inches or moa you're dealing with moa
For reticles you need to identify the one in the scope.
It will more than likely be one of the following
Reticle 43(Zeiss mil dot reticle)
If you come across something different or if you're not sure what you've got just take some pics of the reticle and turrets and I'll do my best to help you ID what you're dealing with
Ideally though you're looking for mil turrets with the mil dot reticle 43. Keep in mind though that it is an SFP (second focal plane) scope, which means the reticle will not grow and shrink as you move around the magnification range, so the reticle will only be accurate at a single power setting.