I found some auction records of pistols with the same stamp...might help to date your nifty little hatchet.
Bacon & Company Single Shot Bar Hammer Pistol, c. 1852-58, serial number 90, walnut grips, marked on the octagonal part of the barrel "BACON &CO./NORWICH C T./CAST STEEL", barrel lg. 6, overall lg.
also
Bacon & Co. Pepperbox Pistol, c. mid-19th century, walnut grips with engraved steel frame, barrel marked BACON & CO. NORWICH C-T., and CAST STEEL, lg. 7 1/2 in.
and this one, earlier, stamped "Cast Steel"
Original 1835 Under Hammer Percussion Boot Pistol by Bacon & Co of Norwich CT
You might be able to research Bacon & Co. at your local library or historical society...during the Civil War they made Navy revolvers.