Someone at the Sako collector club might know.
You will have to contact Sako. Falls outside published data.
Need a DETAILED DESCRIPTION OF ALL MARKINGS to answer.
SN 128273 was shipped in 74 and SN 152027 was shipped in 78. Best estimate would be it was made in the 77/78 time frame.
I have a sako L461 serial no 97578. This was purchased in 1968 , so, I guess no 86302 would be somewhat older.
No known published sn data in the US
No sn data published in english, 100-1000 depending on specifics
Check the auction sites. Check the Blue Book. Do a web search. Rough ballpark would be 400-1000. Depends on how bad you want to sell, how bad someone wants to buy, etc..
62 or so
Depending on condition 400-1000
The Sako L461 Vixen in .223 caliber typically has a rate of twist of 1:12 inches. This means that the rifling makes one complete turn every 12 inches of barrel length. This twist rate is suitable for stabilizing lighter bullets commonly used in .223 cartridges.
It's a high-quality, bolt action rifle, which apparently comes in .223 rem, .222, and a few other high-velocity, small-bore calibers. Sako is a Finnish firearms manufacturer. You can find more information buy searching for Sako L461 on Gunbroker, or reading the Sako article on Wikipedia. A blue book of gun values can help you find the appropriate price value if you're looking to sell or insure your L461.
The twist rate is 14"