See: http://www.gun-data.com/tour7.html this may help you.
Savage Arms
About $10-12
It's worth about $50.
Mossberg 500.
This would be a 12 ga. BPS (Hunter model) pump shotgun made in 1984
Your Winchester model 12 shotgun was made in 1928.
Franchi
500 USD
Yes, they made it.
12 gauge shotgun This is only the model number . They also made a 410 gauge . This shotgun was also made in 20 ga for certain (I have one) and probably 16 ga.
It was made in 1957
Made in 1954.