Sonic on the cover of SEGA Visions: Summer 1991
These photos I'm showing you are magazine photos of Sonic during his debut.
The magazine SEGA Visions was reviewing about SEGA's new mascot and his first game. It's review tends to make readers who the character is, which we know today.
Page 23 of the magazine showed the stages of the first Sonic game and a quiz about the character.