The Phoenix Saga (1): Sacrifice - S3-E3
Trivia: The orange space suits that the X-Men wear more closely resemble those worn by Russian cosmonauts than the black and white space suits worn by American astronauts. This is likely the result of the animation company in the Philippines being given notes to draw the characters in space suits, but in their research probably came across the Russian design, and not knowing any better or investigating further, went with that style.
Chosen answer: It says MPO "First Exemplary Printing House" which is a real printing company in Russia founded by Ivan Dmitrievich Sytin in 1889. There seems to be something about "named after..." as well.
Sierra1 ★