IMHO, Illinois Pinball did the last repo EBD playfield that was close to the OEM.
CPR likes to use their own color choices...

Yes!

"pic 1 NOS" = correct base off white/cream.
"pic 2 CPR" = their pic of base color, snow white.

Another side note:
the screens should be compensated for the inks pressure on the playfield...
1/64 or smaller... the inks spread when printed.

EBD, Frontier, Space Invaders are the only Bally's of that electronic period that
have the cream white playfields. I have two NOS EBD from two time periods of the 1980's
along with a NOS Centaur that was bought at the same time.
Centaur is still white, EBD is still cream. Or as Bally told me, back in the day,
the "Whitest shade of gold".

I would love to see an OEM EBD white playfield.
Do you have contact with anybody that still has an EBD production that has a verified
untouched white playfield?
Back in the day, I was doing EBD playfield swaps almost two to three times a year.
On the west coast, factory EBD playfields were all cream color. I have never seen
an EBD in 1980 that was manufactured with a white playfield.

So is mine... and my NOS spare playfield.

The one thing that yellowed the most over time was the Butyrate plastic sets.

Agree.
Williams also did sample contracting to wannabe playfield screeners.
I ended up with a bad Comet playfield... The engineers at Williams
told me about sample processes to potential contractors.
Luckily that company was not chosen.

Sadly, looking over the new playfields by the two vendors...
A loss of fine detail is getting more dissolved from the original OEM playfield.