County saddle tree sizing

I’m looking into a used County Competitor and it is stamped N2 3 fit. What tree size would that correspond to? I’ve ridden in one before and I liked it, then came across this deal, but haven’t had my horse fitted for one, so I’m trying to figure out if it might work.

It’s probably stamped No 3 fit. That’s what my rather old County says. I’d say the #3 fit is most like a MW.

No 3 is Medium
4 is Medium Wide
5 is Wide