The yellow is not TV Yellow, it is Corona Yellow. It is a brighter colour than TV Yellow.
Note that I eventually had to convert the pickup mounting to a direct screw into wood mounting. Unless BKP have changed their P-90 baseplates since 2014 the stock pickguard mounting will not work. I've had no issues since the conversion, besides the two empty screw holes in the pickguard.
I also had to shield the pickup and control cavities with shielding paint, including a ground wire from the paint to the back of one of the pots, and I have a custom made wiring harness in it these days, two 500K CTS pots with a 0,033uf PETP Russian poly cap (modern wiring).

Here's a photo of it in its current spec.

Stockholm 90 pickup, GraphTech ResoMax NW-2 bridge, GraphTech TUSQ XL nut, Gotoh SG301-05P1 MGT locking tuners, DiMarzio ClipLock strap system, Ernie Ball Hybrid Slinky strings (9-46), standard tuning.