Mossberg, Model 400
Which Model?
Mossberg
50-125 or so
50-150
go to e-gun part
100-300
Proofhouse.com has a store brand chart.
100-450 or so
From the best I can tell, the Western Auto 325BB model was made by Mossberg.
The Revelation 330A series were shotguns, though some had rifled barrels, and sold by Western Auto but made by Mossberg. The 330 line was sold in the late 1960's to early 70s, without a serial number I can't tell you the exact year.
100 USD
It is a Mossberg Model 800.