This silver tone ink sticker is a freebie from the Vert Baudet clothing company. It says "Un Super Autocollant Cadeau , Offered By Vert Baudet" and features the Japanese art from around Sonic 1. (It translates to 'a super sticker gift') This was given out by the clothing company in stores, just for fun. So it was a gift to help increase popularity and good will, you didn't have to do anything to get it, which is both nice and interesting.