According to my pocket size Winchester serial number book your rifle
was probably made in 1940. The first year for the mod 74 was 1939
and I have two made in 39 that are for the short only. Many older
Winchesters will have the date of manufacture stamped on the bottom
of the barrel in two digits only, right in front of the receiver. The
numbers are small and may take a bit of looking but are usually there.
They do not always agree with the serial number books but are usually
within 1-2 years. These numbers may indicate the date the barrel was
made, not the shipping date of the gun but no one seems to know for
sure.