Gotta agree with the Westenheimer. I've never heard of an F-12, either. Here's what an F-112 looks like, though, and it looks like a match:
http://www.vintagefret.com/pages/12258.html
Note the big truss rod cover and the lack of inlays - there is no Chesterfield on the headstock or position markers on the frets. It would help to see the back to confirm tonewood and open tuning machines. The F-212 is very similar, but I think it is rosewood, rather than mahogany. (Can anyone verify?)
>>>No, the F-212 is mahogany, also...at least both of mine are (mid-70s), never heard if they changed woods at any point.<<<
I posted an entry after playing a Taylor 12 last Tuesday. Short story - I didn't recommend it.
But there's a long, recent thread here titled JF55-12 Half Price Sale that includes a lot of discussion about 12's.
http://www.letstalkguild.com/phpBB2/viewtopic.php?t=1650&postdays=0&postorder=asc&start=0
Is the 12-string GAS building up? Don't look here for sympathy. Go get that puppy. :twisted: