Unless it's a pre 64 model, or a family heirloom, it would be financially better to trade it off than to sink a bunch of money in it. They are common and aren't that expensive. I'm not sure any of mine have a serial number on the barrel.
In 1964, Winchester was bought out, and the new bean counters redesigned the model70 to a push feed design similar to a 700 Remington or model 10 Savage. (Think smooth bolt with no claw extractor). In the late 80's or early 90's, Winchester came out with the "Classic" action that resembled the pre 64 claw extractor action.
Sam Hoster in Gallatin would be my first thought. If the locking lugs are set back into the receiver, I believe I'd send it down the road.
Before engaging in any transaction of goods or services on TGO, all parties involved must know and follow the local, state and Federal laws regarding those transactions.
TGO makes no claims, guarantees or assurances regarding any such transactions.
THE FINE PRINT
Tennessee Gun Owners (TNGunOwners.com) is the premier Community and Discussion Forum for gun owners, firearm enthusiasts, sportsmen and Second Amendment proponents in the state of Tennessee and surrounding region.
TNGunOwners.com (TGO) is a presentation of Enthusiast Productions. The TGO state flag logo and the TGO tri-hole "icon" logo are trademarks of Tennessee Gun Owners. The TGO logos and all content presented on this site may not be reproduced in any form without express written permission. The opinions expressed on TGO are those of their authors and do not necessarily reflect those of the site's owners or staff.
TNGunOwners.com (TGO) is not a lobbying organization and has no affiliation with any lobbying organizations. Beware of scammers using the Tennessee Gun Owners name, purporting to be Pro-2A lobbying organizations!
gregintenn's post in Headspace Issue on a Win Model 70 Belted Magnum was marked as the answer