I look at it this way … I used to own an mgb
it went wrong more often than you’d expect
when the fuel pump went I bought a new & better one. I didn’t seek a rebuild of the exact fuel pump it started life with. It had lasted well, but was frankly a bit rubbish. Theres no use in pretending that every “old” bass was made perfectly with components that were functionally perfect and that the whole thing emitted magic sparkles unless changed, whereupon it became as lifeless as the worst 70s Kay
I didn’t add a whale-fin spoiler to it and in the same vein I’d never re-fin an old bass. It is irreversible
it still looked like an mgb and if it had optical ignition rather than clunky old points, no one will know.
In the same way, it doesn’t matter if a volume pot has been replaced with a modern version of the same thing. Keep the old one for those of the potential buyers who might care, and use something better for you in your time owning it. No one truly gives a toss about original, unmolested solder joints. 🤷
afterthought: those “included original pots and pickups” where replacement has been declared to the buyer. I’d be really interested to know proportionally how many vintage buyers have gone to the trouble of having the original part repaired and replaced in the instrument. I suspect “quite few”… just as I preferred optical ignition and an electronic fuel pump.