There are many more people more expert in this field than I am. I did not find your sword in any of my references. There seems to be a lack of detail in the metal work of its hilt, which raises suspicions. The glimpse of scabbard suggests that the scabbard is highly embellished, but the degree of its detail is not visible. You can submit some photos to the American Swords LLC website for assessment. That site has a section about how to spot fakes. Sellers of militaria should not be taken at their word because they may be honestly mistaken about authenticity; or, they label everything as "War of 1812" or "Civil War" because such items are more desirable than those used between the wars or afterward. There is a surprisingly active industry of faking swords and other militaria. The House of Swords was notorious for elaborate fakes (Its proprietor was shot to death in a parking lot). Sometimes a fake is so well done that it is satisfying to own if its price is appropriate, and I keep more than one such fake.