Early features include: First type barrel marking, octagonal 3 1/2 inch barrel, 5/8 inch priming cut-out, round cylinder with cabin & indian scene, in .28 calibre. This particular Root revolver was in the possession of the Paris Museum of Antique Armouries from 1964 to 1973 and was subsequently sold to the late Paris  private collector, M. Marchand Andre.Purchase includes a signed copy of “A Collectors Guide to THE COLT ROOT SIDEHAMMER Manufactured 1855 Through 1870” by Malcolm R. Burnette. From The Burnette Collection.