Japan
Your winchester model 101 was made in 1966 by winchester.
Your Winchester model 101 20ga shotgun was made by Winchester in june,of 1966.
The 101 was made from @1959-1987.
With the serial number provided;your Winchester model 101 was made in June of 1969.
Your serial number indicates that your Winchester model 101 was made in June,1969.
I would say that your Winchester model 101 was made in the mid 1970,s.
Your serial number indicates that you have a winchester model 101 in 20gauge.This shotgun was made by winchester in 1966.
I believe that your Winchester model 101 was made in July of 1971.
i believe that your Winchester model 101 shotgun was made in either 1972,or 1973 with the serial number that you have provided.
Made from 1959-1987.
Proofhouse.com has Winchester sn tables.