Since you did not provide the serial number, you will have to call S&W
CHECK THE S&W COLLECTORS SITES
The manufacture date was march of 1923.
Not listed.
If the weapon is Westfield model its manufacture date would be between 1949-1968. The value of the Stevens 9400 is between $900-$1200.
Manufacture date 1954
1972
"caliper" is not a term associated with handguns. There is no way to answer the question with just the serial number.
1947
date of manufacture 1901
500 or so
You will have to provide the name of the maker.
Who made it? What caliber/gauge?