The L579 was a model number that was used by Sako.it describes the action type.The info that you provided will not indicate what caliber that you have.Your Sako rifle should be marked as to what caliber your rifle is chambered for,somewhere on the firearm itself.
The Sako L579 in .220 Swift typically features a twist rate of 1:14 inches. This standard twist rate is designed to stabilize lighter bullets commonly used in this caliber, enhancing accuracy and performance at various distances. Always check your specific model or consult the manufacturer's specifications for confirmation, as variations may exist.
early 60s or so
No English sn data published
Impossible to answer without the sn.
early 60s or so
1/10
100-1000 USD depending on specifics
@ 28 years old
AROUND 1986
@ late 70s
100-1000 USD or more depending on specifics
Value is anywere for 900$-1800 depending on condition