$175-$225.
Try e-gunparts.com
Actually the shotgun uses 16 gauge shells i have the same shotgun
No published sn data
50-200 US Dollars
http://www.histandard.info/PDF/Sears%20Shotguns.pdf http://www.histandard.info/manuals/sears/sashotguns/index.html
Proofhouse.com has a store brand chart. When you find out who made it a value can be estimated.
1958
No
A Winchester Model 140 12 gauge, semi automatic can be worth up to $150. The exact amount that the Winchester is worth depends on the condition of the gun.
EBay for 38.00
Model 58 is an automatic not a bolt action
Up to $100.