Given that there were a very limited number of accessories actually factory-fitted (of which the radio was not one), you could argue that any radio Air-Chief or otherwise is not "as it left the factory". You could then extend that argument to include pretty much every accessory.
After all, who's to say that the radio wasn't fitted by the original owner after he'd had the car 12 months? In which case the radio stocked at dealers would have been the transistor job.
I know I'm arguing against what I wrote earlier. It's all very philosophical
For what it's worth tho there are pictures and some comments about which radios suit which model on the pages I referred you to the other day.
cheers
RET