See: http://www.gun-data.com/tour7.html this may help you.
Which Model?
Mossberg
It is a Mossberg Model 800.
From the best I can tell, the Western Auto 325BB model was made by Mossberg.
50-125 or so
go to e-gun part
Proofhouse.com has a store brand chart.
Mossber Model 402.
Mossberg, Model 400
100 USD
10-100 usd
Western Auto Supply Co. Made in USA