Francesco, I see that you're posting questions about AARs all over the place. I think you don't understand what you're trying to do.
For the fair dinkum on AARs, visit www.graflex.org and read the FAQ. I wrote it, I'm not going to type it again.
I don't believe you can use an AAR on a Premoette but could be mistaken. The AAR slides into a large format camera's back like a standard sheet film holder. If your Premoette will accept standard sheet film holders, you can use an AAR made for a 2x3 camera with it. But I've had two Premo #12s -- also 2x3 cameras -- that accepted only pack film and non-standard sheet film holders. Check whether an AAR for 2x3 will do what you need before buying one.