Great question - I did not realise they were different. The inner lens do not have any pencil marks, so I will label them myself and take 2 photos to compare. Should these be at infinity or is closer up ok? Infinity photos are problematic at the moment, so I would prefer a stobe illuminated target.
Look up a diagram of an Artar and check yours. I can look at one of mine and tell you which way they go tomorrow. Close up will be fine.