I don't specifically collect advertising models, but for me if there is advertising on it its often a bonus rather than a disadvantage. There was a red alox pioneer with Brütsch Rügger on ebay not so long ago that I let go. I still think of it sometimes whilst watching another sunset over the horizon .
very nice, looks sort of cherry red rather than orange red like a normal red alox, is that just the photo, or is that how it really looks?
I don't really collect them, but here's one I especially bought because of the nice advertisement (Moncada).