1970's X Rating Screen by GrayLord791 on DeviantArt

X (MPAA), Rating System Wiki

RetroNewsNow on X: 🎬On November 1, 1968, the Motion Picture Association of America's film rating system was officially introduced with the ratings G, M, R and X / X

Whatever Happened to the X Rating?

10-7 in 1968 - The Motion Picture Association of America adopted the film- rating system that ranged for G to…

File:X MPAA.png - Wikipedia

CLOCKWORK ORANGE' TO GET AN 'R' RATING - The New York Times

MPAA X18 Rated Logo by JamesMoulton1988 on DeviantArt

Saw X' Is The Most Well-Reviewed Saw Movie Ever, By A Huge Margin

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All the X-Men Movies Ranked - IGN