Upvote:-1
Some quick google foo:
http://www.horsesoldier.com/products/edged-weapons/swords/12901
http://howardlanham.tripod.com/link11d.htm
Based on all that is provided I venture to guess what you have is a Union NCO sword. This particular maker in keeping with convention of the times created different styles of blades which were indicative of various specialties and rank. The level of ornamentation of the blade and scabbard also reinforces my conclusion of it being an NCO sword.
As with most swords the most revealing information lies in the handle and makers mark, which yours ~appear to look akin to. I also like the weather condition of your guard as that is ~good sign towards its authenticity.
However, I nor can anyone online really judge the sword to be authentic. I suggest taking it to an auction house or authentication service if you wish to have it verified.
Upvote:4
The problem with this identification is the number of possibilities. Knowing the manufacturer leads us to several options. They absolutely did sell to the US, and many similar weapons can be found through some googling. One site AntiqueGuns.com, has what appears to be a matching weapon, listed as an heavy cavalry saber of Civil War era. The entry also has a lot of good background info on the company S&K, and a possible reference source to look at in the book CIVIL WAR CAVALRY & ARTILLERY SABERS by John J. Thillmann.
Unless you offer a reason why you think its American, I will also offer an alternative to this being a US civil war weapon. The model you have seems to be a very good match to one for sale at this site, Bygone Blades. This weapon is listed as an Italian 1860 Heavy Cavalry Sabre by Schnitzler & Kirschbaum. The images there show the exactly matching pommel, grip including the small rectangular cutout visible on the hand guard in you image, spear type point, and list the length at 89cm, matching your measurements exactly.
Whether or not this weapon was made for the American market or for the Italians, (or some others I haven't found yet) I think we can be confident in the 1860 Heavy Cavalry Sabre identification.
As to authenticity, I absolutely concur with the other answer. That should be left to a hands-on inspection by an appropriate expert.