As Researcher observed, Hartford Arms Co. was a tradename Crescent gun for Simmons Hdw. and Shapleigh Hdw., both of St Louis. "Genuine Armory Steel" is fluid steel; not Damascus.
You have no way of knowing what loads have been inflicted on the gun, or what 'work' has been done on the barrels in the last 100 years, and should not shoot the gun with ANY load unless it has been evaluated by a double gun specialist smith.
More infro here
https://docs.google.com/document/pub?id=1OxZo5Tkvx2G8eYf747QR9B5RJdN6Siu5JGIhfguSXXQ
