Yup, 6 speed and the picture maybe doesn't do it any justice but when you look at the bike it looks weird, I've never seen anything like it. It almost looks as big as the smaller chain ring.

I was looking online when I originally got the bike on the Shimano 600 series and most of the finds were about having it on older MTN bikes, so not sure if that's where it's from?

the giant pizza sized dork disc doesn't help.