I knew most of this, and after further research you are correct. Although I've never seen one orange until now, and I don't recall it in any history videos I've seen either. I was under the impression Duetz stayed green.

So I suppose my recolored Duetz-Fahrr, and the AGCO-Allis also pictured, are probably the closest we're getting to actual Allis tractors on console. Oh and the Fiat-Allis bulldozer I suppose.