You have described it; a 22 LR semi-auto
o no published sn data available
Approx. 51 years and street value of $79.00
new haven model number 4958 serial number 427569
125 or so
Go to google and look up images of a "marlin model 80". Model 80's were made in new haven from 1934-1939 or so and then I believe the plant was moved to north haven.
15-125 USD or so
Gun shop.
$150, depending on condition
With the serial number that you provided,your Winchester model 74 was produced in New Haven,Conn in the year 1947.
Serial starting with T would be 1960
1888 at the New Haven, Connecticut, factory.
No sn data published.