Can someone explain Motorola's model designations to me ?

[Chucklbunny]

Hi again all !
Can someone explain the model designations for Motorola TV's to me. I have a 17T13 and would like to know just what that stands for. I have seen a 17T9 and it looks almost the exact same as my 17T13 so what do the model numbers mean ?

I know the "17" stands for "17inch" and the "T" stands for "Tabletop" but after that I have NO idea what the last digits mean.

If anyone also knows what models were made in 1951 that would also be a big help.

So once again I come to the experts......can you help me?


Charles