This is a British Light Cavalry Trooper's Saber used from the period of about 1821 to about 1860. This pattern was copied by other countries as well as the United States as the US Model 1833 Dragoon Saber. These style swords saw service service in the Crimean War and were also exported to a number of countries - including the Confederacy during the American Civil War.
Slightly curved single-edged blade with squared back-edge; single fuller (both sides), stopped at ricasso.
Overall length is ~40-1/4"; blade length is ~34-3/4". All steel construction with the exception of the wood grip (leather wrap is missing on this example but most of the twisted brass wire remains.