Jim Burns wrote:

What it looked like was an early straight leg 172 fastback, but it had a
swept tail, not a straight tail. Beautiful airplane but nobody had heard of
a swept tail fastback.

The swept tail was added in 1960. Omni-vision came around in 1963. You probably
saw one of the interim aircraft.

George Patterson
Give a person a fish and you feed him for a day; teach a person to
use the Internet and he won't bother you for weeks.