Original and Model A are terms that generally do not go together. Unless you can document entire ownership chain and the story as to why it has escaped restoration for 90+ years it's a guess at best. See if there is a MAFCA or MARC judge near you who knows the details between original and even very good restoration parts.
I'd say it's a repaint due to the thickness of the peeling paint on the top -
https://lh3.googleusercontent.com/fi...-w320-h200-p-k - it appears there was a thin skim coat to level out the area and like all of those products from the 60-90s it has failed an peeled off.
Remember NO ONE knows exactly how a car left the factory (except one of those very rare unrestored ones) so build it the way you want it.