SPID match- How do I determine what is original?

[Duluth67]

I have a 1967 K20 with an interesting glove box sticker that matches the chrome tag on the door post. What is confusing to me is that certain things seem to match, but others don't. How can I get to the bottom of this?

What I know:
Small rear window
amp/ oil pressure equipped
No PS No side molding (anymore?);steel box; front stabilizer
283 V8; 4 speed SM420; Rockwell T221 T-case;
Eaton 4:55 rear; Dana closed knuckle front;

Repainted blue; light aqua blue is original in the engine bay? Drivers door appears to have been red at one point; blue seat, blue steering wheel.

Do you think these stickers are original to the truck? Thanks!