Heath 235-1006 Focus Ass'y (Projection TV?)

[Multi-Volti Devices]

Hello:

I have a box of 11 Focus Assemblies with Heath part number 235-1006 and
Zenith part number A-09120-03.

Does anyone know what model they were for, and/or have a use for them?

They're rather large (reminds me of a large, square automotive
distributor cap).

Thanks

Murray