Hello No.1,
Sorry by delay. I had a busy day yesterday in the office (my scanner is here, and I can scan my books in a little chances).
Well, this is what I have and I hope it helps you.
I scanned this book from 1968, it has very rare photos. Mainly, you can find what I was telling you about seat color. All cockpit interior is Interior Green as point of comparation.
http://www.dogfightmoldel.com/p38/P-38 Lightning - A pictorical history.pdfI would like to show some photos as future reference about seat and back plate in early model previous J model. But, I have found some units with dark tone in black-white photos in L and M models.
Well, these photos comes from In Detail & Scale book of Bert Kinzey. It it about of restoration of Glacier Girl (P-38F), he was recovered as it was found it. So, I am confident that it is an excellent reference about color applied it!! Olive drab!!
But, I found some -G model with a dark tone in other books. In a color photo, there is no doubt and in B&W is possible to compare it with headrest. This is what I have.
In Fighter Command book, you can find these.......
One more in B&W from model -G (Rex Barber, pilot)
Talking about serial number, I share this to pages from Wardbird Tech book, you can see in plans view a note, doing reference to a serial number. It is from J-25 block series. Not -20 as I had described
Finally, landing gears.........
I think it is the best reference for you in this time. In NASM, P-38J-10 is displayed in a unrestored condition. So, we can pay attention of colors of landing gears and internal covers, as were painted in wartime. Sadly I have two photos by now that I show this. I would like to have inner views.
One point more, check that oval mirror in engine nacelles are flat, not as Minicraft mold them. You have to remove them, take a look in last photo.
I hope this information helps you now and mates in a near future.
Thanks
P.S. Sorry about high resolution in some photos, but I believe it is better to check some details very clear.