Call S&W and they will tell you when it left the factory. It could have been made a week to a year before.
The year of manufacture for serial number 25035 is 1947.
No way to answer without the caliber.
1927
Sorry but we would need the serial number to answer.
1920
1918
No published sn data
1958
1950
1890 for light frame .22rf caliber and 1886 for mediam frame .32, .38 & .44 caliber
There are several models that could have that serial number, more information on type / description is needed.
Without knowing the model and caliber, we can't tell. A serial number ALONE does not identify a gun.