I own a Sako in .22PPC. Some refer to it as a Vixen also but the name was used far and wide and sometimes it was just printed on the box the rifle was shipped in.
Check out this forum. They can tell you everything you want to know about your Sako:http://sakocollectors.lefora.com/?utm_so...550678-6bf4e273
In the mean time this link shows all Sako serial numbers:http://www.sako.fi/pdf/datatables/SakoOldmodelsNumbering.pdf
I did my first varmint shooting using my dad's Sako .222 heavy barrel (also with the wide front end like yours). It was a factory rifle. I love the thing and vow to pry it from his fingers one of these days (and he owns literally dozens of awesome bolt rifles).
I got tired of waiting and bought my Sako. Besides being in .22 PPC and therefore dead accurate, it is a single shot with adjustable trigger - well under a pound by the way and completely safe.
Here was mine before it was in my hands:
Oh, and I paid $1100 for the rifle, Redding Competition dies and 400 pieces of brass.
Here it is "in use" (photo credit: Tom Austin of Predator Strikeforce):