It can be seen here (7th and 8th scan):
https://www.atarimania.com/game-atari-2600-vcs-et-the-extra-terrestrial_7300.html
Interesting theory about the Missile Command display.
Could very well be the case.
There's the Jerome Domurat initials version that was shown in some magazines, but never released:
https://www.ataricompendium.com/game_library/unreleased/unreleased.html#rotla
Could be you remembered this.