any Chevy Gurus out there?....

[seaglass]

What am I saying of course there is!!!!...haha or maybe anyone willing to take a wild guess as to what these seats came out of?

Back story is that they came out of a late(ish) 60's chevy. Already installed when I bought the truck. The guy couldn't remember what they came out of....

Seems like the top has a spot for a head rest slide. Removing the screws did nothing, it is like the plastic piece is glued to the leather. Looks like one thick rod inside and not the two post style "modern" headrest.

Seat moves forward sliding on rails as well... perfect for getting to my gas tank

Has one of those little "flippper" switches so my guess is it came out of some sort of two door coupe.
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There is lettering in the foam 20421686 on one side and F-E(F?)-8 on the other side, not sure if that means anything

If additional pics would help let me know. I am trying to find the OEM color so I can match a few interior pieces to them and possibility repair the seats as well.

Thanks for any input!!!