Accessory rangefinder

I just cleaned the glass in the little Voigtländer accessory rangefinder. That was easy: 2 screws on the front gives access to the interior.
But now I also want to clean my Präzisa(, which I like better.) I find one screw under the leatherette to the left on the back. But there must be one more on the right side somewhere. On the front outside the windows there is no screws. And I hesitate to remove the leatherette in fear of tearing it. I screwed out the screw in center of the focusing wheel. That didn't make anything loose and it seems I can't remove the wheel to look for a screw under it.. Anyone can help me with this sweet little tool?

May be this will help ... ? https://www.rangefinderforum.com/classics/forum/messages/2/16349.html?1281455872

Put the screw under the leatherette back for now.
Unscrew the window, it may be stuck.
The focus wheel is likely stuck also, gentle prying with two common (flat tip) screwdrivers 180° apart should do the trick. You may have to lift one side then the other.

Thanks for the link, macfred!
This was a bit more complicated than on the Voigtländer. Well, I'm afraid of maiming the plastic distance scale plate.. In fact, my Präzisa is fully useful like it is. Precise and in nice vertical alignment. It's just the forever fussing perfectionist in me that want to have them glasses 101% clean! So maybe I should leave it like it is.

A little adhesive remover around the edge of the dial should loosen it for removal without damage.
Adhesive remover can be washed off with alcohol and the dial reattached with contact cement.

The dial looks painted on in your picture.
I too prefer crystal clear optics.

Thanks for the advice, shutterfinger. (I do think it's a plastic plate.)