Definitely an 1840 style grip, lacking the Model 1860's bulge as mentioned above, but also has the tell tale 1840's wire wrapping extending all the way down the leather and under the pommel cap. Where the leather is missing and the wood exposed, you can see the smooth wood grip and cord wrap that creates the grooves for the wire wrap, a typical German trait. While you do not show a photo, the Model 1840 also typically has a flat back or spine on its blade, while the 1860 is rounded. Unfortunately, since this style saber was also used extensively in Europe, unless there are some markings for proof, it's impossible to say if it saw use in the American Civil War. But many were imported, and it is of the type used.