Anyone know what this pin is for? It does not look like official Apple merchandise, but maybe for a Mac publication of some kind? I've never heard of "Macintosh Today"
It looks like a short-lived publication:
"Large-format Apple Macintosh-related industry news magazine. Apparently was published more often than monthly."
http://macgui.com/usenet/?group=14&id=18225 (Usenet post from 1988)
Perfect, I knew somone here would know!