>>19483465 pb
>That coin is from 1967, not 1968
That makes sense.
I misspoke. The earliest 9/11 reference is 9/11/1966, with a stargate reference. DIAS.
Then we get a few more in 1967, then drips/drabs (e.g. UK TV doctor who has a reference in 1974) then in 1977 the movies start - superman, bttf, trading places etc etc etc