Admiral model# difference?

[6GH8cowboy]

I have a Color Rectangular Admiral LK 5541 that needs a flyback. I located one for a LK 5541 M.

Anybody know what the M would indicate ?

I used to work for a Admiral dealer but havn't the foggiest notion what the difference would be. Remote, Combination, Institutional, Motor tuner, Metal Cabinet ?

The original part # is 79D110-6 Dont know what the replacement would look like.

Any ideas would be a help. Any body have one in a doner chassis under the bench?