Western Auto sold several 22 long rifles. I need the model number to help identify it.
See a gunsmith
Your Western auto model 150M was made for them by Marlin.The Marlin model 49 and your model 150M are one and the same firearm.the Marlin model 49 was a promotional model made by Marlin from 1968-1970.
go to e-gun part
Most likely it's a Mossberg 321-320
100-450 or so
It is a Mossberg Model 800.
Try e-gunparts.com
50-125 usd
Take it to a gun smith.
$75-$150, depending on condition. That is if your rifle is a semi-auto. It would be a Marlin 49. However, Western Auto also had a 150M, which is a Marlin 39A- Value $300-$450
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.
There are no public SN records- but your rifle was made for Western Auto by Mossberg, and is their Model 472. That model was only made from 1974-1979, when it changed to Model 479.