KCS78C/17-H-1 Information?

[JoeNewberry]

I seem to have a habit of acquiring old technology that has no ready source of information available for it. In this case the RCA Victor TV I received from my grandmother's estate, that I mentioned in my introductory post.

I have found people selling Photofacts and other information on the KCS78B (which I bought the original Sams for today for 4 dollars), KCS78F, KCS78H, L, M, etc. But no KCS78C. I checked the Riders index to no avail. Additionally, all I can find is reference to the 17-S-XXX or 17-T-XXX models, no sign of a 17-H anything. Am I missing something obvious or do I just have a TV that came out in a small quanity between major revisions and never got written about? Any idea why there's this oddball 17-H-1 designation that no other RCA from that time seemed to have? Should I get the KCS78F Photofacts, too, and then just try to split the difference between it and the KCS78B?