The 1860 Model Spencer Carbines that were manufactured between 1863-1865, had serial numbers falling between 11,001 and 62,000. The US Army received 45,733 of these in number and may not be matched by serial numbers. Your Carbine with that serial number would have been near the end of the production run. It may have or may not have been used in the civil war late. But more than likely it was a war time surplus and issued out west during the Indian Wars. There is a possible chance it could have been sent to France in 1870 for the Franco-Prussian War, many were sent over there, but not likely it was sent to France and found its way back to America, but could have happened. With all the minor changes to these carbines over the years and up until production stop about 1869, These changes sometime they give clues to when and where they were used.