the A48 and M48 haven't been made in a long time. I'm assuming they're from the 90s at the latest.
Probably original equipment on the bike, can't imagine anyone actually buying those. When I replaced the OE Michelins on my "87 with Metzlers it transformed the bike in a very good way.
You've got a nice bike there. Ride it and enjoy it as much as you can. Don't worry about how shiny it is....imho.
That's interesting. I've read a few other posts from people who have replaced those Michelins with positive results. This is my first time going with Shinkos and for the price, they're great.