Admiral 14UY3C Chassis CRT Question

[Chris K]

Steve M has two 14RP4 CRTs in stock and my Sams covers chassis for both the B and C versions in a single document. I have the 14UY3C version and the Sams lists 2 CRTs...14RP4 and the 14RP4A which I'm assuming is the aluminized version and that one fits the B chassis and one fits the C chassis.

Are these CRTs interchangeable or does anyone out there know what tube is the correct one for the 14UY3C version of the chassis?

Thanks
Chris