Which I would guess meant the paint used was not compatible with the substrate of the dial .... ergo .... there would not be much ( if any ) evidence of it being there in the first place
I don't see any other theory for that dial ?
It's not pre v
It's not a spaghetti 'A ' series dial
It's clearly a pre A dial to my eyes
I agree it would be a good idea to have the case back cracked open to corrolarte the numbers 👍