Shower diverter

[JRK]

Hello, wondering if anyone recognizes this diverter cartridge from a two handle tub/shower valve from the early 80's?

Thanks

 

[breplum]

Sorry for you.
An exercise in futility. Even if somebody recognizes it, there will be no parts available. It is a rare design that became obsolete immediately.
The handles look a lot like Savoy, but that diverter knob is really a rarity.
Abandon all hope of replacement parts unless you can fashion something from existing materials.