Can anyone explain Panasonic product codes / model numbers?

Hello,
I know that this is not exactly a question from the IT field, but if TR members don’t know the answer, nobody does =)

So, does anyone know if this info is correct, or maybe if any broader explanations can be provided?

Panasonic TX-L##abcX(y)

TX – type of the tv (here it’s a LCD tv set)
L – ???
## – screen size in inches
abc – series code (?) (always 3 digits?)
X – region for which the tv is produced (?)(E = Europe, J = Japan, etc.)
(y) – revision code or production plant code (?) (not always written)

Googled it, but didn’t find any concise info, and any help is much appreciated!