.22 what?
Bolt action?
Semi-auto?
.22 inch pins?
What?
If you are talking about rifles chambered for .22 LR, the answer is about 95,000 in the year 2007 (the official anniversary). But, they continued making 150th Anniversary rifles through 2008, too. So... maybe 195,000 (or more!?).
They are not rare or valuable. Don't get excited.
