I've restored a couple of Montgomery Wards Airline Radios. You're right that schematics can be difficult to find. Seems Montgomery Wards used a lot of different chassis, so it can make tracking down your model kind of difficult. I tended to treat them like generic five tube models and expect component values that work in other applications.Send me a photo of your radio, or post it here. I'll help you out as much as I can.