this may be one of the long scale F-20s from the 1970s- there are much fewer of these around than the short scale F-20s from prior and subsequent to those long scales (60s, 90s etc). Hard to say from the photos if it is actually the long scale. those long scales are a significantly different beast than the typical short scale F-20 (a true small bodied guitar) ...longer scale, deeper body, and baseball bat necks from what i've seen on those mid-70s. I had one and sold it, it sounded just like a dread.
Also hard to say if a headstock repair has or has not been done on this one.
overall, since you asked, this is not a guitar I would buy unless I could check it out live and in the flesh first. May turn out to be a gem, just hard to say.