Foggy memory but IIRC 15Y6C15 was the first 14" Zenith. A tin can set with a console chassis stuffed in. Probably the first to use
the IF module & drive the tube count by 3. Ball buster to carry but
it did have a handle. Someones sick sense of humor.......
First SS set was C-line 25CC55 IIRC. Big difference was it
used a pass regulator instead of the self regulating transformer.
Also there is a schematic for a B line SS set in one of Zeniths CM's.
Probably never sold, maybe a test / show set.
73 Zeno
LFOD !