There are lot of Sonic pin sets out there, but I cannot say I have ever seen these ones. Matt Hancock sent me these photos of a rather fancy five pin set promoting Sonic 3, apparently given away back at CES 1994 and bought in New Zealand.
I sure would have loved to have visted at least one gaming event when Sega were at the top of their game. They had Sega buses, celebrities holding Game Gears and everything. I'm sure those were magical times.