"Dan," this gun might be a post Civil War product or an assembled product of the Amoskeag Manufacturing Company, a New Hampshire located manufactory with which the inventor Edward Lindner was associated at time of the American Civil War. The company built a very limited number of rifles based on Lindner's innovative design, which productions are some of the rarest rifles manufactured for the war effort and also a much sought after prize for the period gun collector. These rifles usually bear only Lindner's name, but sometimes evince "EDWARD LINDNER'S PATENT MARCH 29. 1859" neatly stamped at the breech.
It is possible the business relationship did not end with the close of hostilities. Alternatively, Lindner might have sourced a company in England and had the parts imported and assembled in the United States by the Amoskeag Manufacturing Company, and then used the brand name "Lindner & Co" as the abbreviated maker name for the resultant product. All of this is pure speculation, and is only provided to further advance the discussion of the subject gun.
Regards,
Edwardian
