By it's serial number
You will need to call SIG to find out.
No serial number data published that I know of
The date of manufacture should be on the model/serial number plate inside the unit.
Your Winchester model 1894 was made by Winchester in 1974.
You will have to call S&W to find out.
If you wish to supply the serial number,I can look up the date of manufacture for you.The serial numbers for the Springfield trapdoor rifles and carbines are in the general domain for people to find.
The actual "date of manufacture" is almost never stamped on the gun, though the serial numbers usually have at least an approximate date encoded within them. If wishing to identify the manufacturing date of a weapon, always include make, model number(stamped on the weapon somewhere) and serial number(ditto).
manufacturing company of combine can tell you year of manufactur from the serial number
You will have to call S&W and provide the serail number to find out.
You will have to call Browning an provide them with the sn to find out.
Every single Garand legally made has a serial. You need to give it to find out when it was made.