No serial number provided.
.270 has been around since 1925. You will have to contact FN to check on the sn.
This gun was made in 1948
1928
If its a 12ga it was made in 1926 If 16ga, it was made in 1929
1985
1988
Made in 1950.
Made in 1954.
Your winchester model 70 rifle was made in 1951.
22 years old
With the 3S prefix to your serial number,I can say that your browning sweet sixteen was made in 1963.
My F.N. Mauser in .30-06 s/n 4570 was made in the mid 1950's. I have been unable to learn any more regarding the F.N. mausers. It is a true a classic, hope this helps