[Boatanchors] Learning Code during WW II

[William L Howard]

I am struggling with a small size copy of TM 11-432 "Code Practice
Equipment" so please bear with me.

The list of items include an:
Automatic keyer McElroy model G 823(#???) and a
Automatic keyer McElroy model G 813 modified and a
Automatic keyer Len Ga Tone Type 7.

Now does anyone know what these items are, what they looked like and
maybe have one for sale? Also anybody have the TM?

Thanks,

Bill Howard

William L. Howard Ordnance Technical Intelligence Museum
wlhoward@gte.net  Web Site www.wlhoward.com Phone: 727-585-7756