Ah the semantics of wording.
"
The truck has been stored inside for the past 50 years and only recently benefited from a couple of linseed oil applications."
This is really a important sentence in the discussion.
Anything taken care of and maintained will last. And since his boards are over 50+ years old. I go with close enough.
I doubt you will find "original" pine on anything that was stored outside to get hit with the sun and will "maintained" by the dropped liquids in the back.
