5-valve plus magic eye tuning, broadcast band portable tablegram.
Note there are various different incarnations of the Maryland - this is probably the correct one for this service info but confirmation would be appreciated.
Valves (5 + magic eye): ECH81, EF89, EBC81, EL84, EZ80 and EM81 Magic Eye
Intermediate Frequency: 455kc/s
Frequency Bands: 1
Chassis Notes(most schematics can be clicked to download a full size version)