Electronics wise the same. The first letter is the use code
A= TV M= monitor. First # is screen size in cm. The rest is the
family & physical specs, things like neck size, bonded yoke,
mounting, etc.
The H is a mystery. May be just the type of screen glass or
some other minor difference. I used to have a sheet on the
scheme but its long gone. Maybe someone else has one.
73 Zeno
