See link below for year of introduction of Sako models:
ABOUT 1974
No published sn data
60s
early 60s or so
80's or so
Late 60s to early 70s
early 60s or so
Impossible to answer without a detailed description of all features
No known published sn data in the US
Impossible to answer without the sn.
Sako L61R ser num: 1 to 90954 Manufacturing date between January 31st, 1962 and September 12th, 1973
Late 60's to early 70's