Victor TT 801

I don't know,

I just bought a TT81 large dual arm plinth from this seller who sold an 801 not long ago

https://www.canuckaudiomart.com/details/649456972-top-model-victor-tt801-turntable-with-original-box-and-accessories-reduced/images/1971109/

he knows a lot about these units, sells a lot of good equipment, perhaps he can lead you to a copy of a manual

very cooperative, my unit arrived perfectly packaged.

perhaps write this seller, or any seller, ask how much for a copy of the manual

https://www.ebay.com/itm/Super-Rare-Victor-JVC-TT-801-Direct-Drive-Turntable-/254201602453

Just TT-81 but with vacuum pump, this is what TT-801 really is