The gun has been poorly refinished
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/Repairs-Restoration/i-TMgpTWp/0/Fd6mZfQpXcZ5FKvJ3rnWdWGMs8kKwqH9GNDSpNLwg/L/zpP9TXi-L.jpg)
The 'case colors' on the sideplates and action are from heating the metal with a torch and using cold blue to produce colors
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/Repairs-Restoration/i-rXTmPBs/0/sWDSKfSGNWdkCK9rnF6BKK8bcXbbdCMSrG7kkBKR/L/5asyI8s-L.jpg)
The barrels, triggers and trigger guard have been blued, likely with hot caustic salts meaning the 2 barrels and ribs will, before long, separate. 
The barrels are damascus and it is likely they were cut. A gunsmith could measure the length of the choke constriction to confirm, and you might see a gap between the keels and barrels at the muzzle. 
![[Linked Image from photos.smugmug.com]](https://photos.smugmug.com/Repairs-Restoration/i-cf5M82b/0/CzkTmVrkJMNrMxBRXqzNPDfmgp6LknwZj9h7w3RPB/L/NiLrt98-L.jpg)
We think 'SD&G' is Schoverling, Dales & Gales; a large sporting goods firm in New York City. 
If you can return the gun, do it.