Beitman Most Often Needed Radio Diagrams

Brand	Model	Volume	Page	Pub year
Zenith	5-R-312	1 (1926-38)	218	1926-38
Zenith	5R312	1 (1926-38)	218	1926-38

Rider Perpetual Troubleshooter's Manuals

Brand	Model	Volume	Page	Pub year
Zenith Radio Corp.	5R312	9	7	1938
Zenith Radio Corp.	5R312	10	40	1939

The next Vintage Electronics Expo will be on Saturday, January 25, 2025
at the Oakland Expo Center, 2212 Mall Dr E, Waterford, MI