Whomever got that got a bargooon. That is a 'working sword' rather than a dress sword. Really the only thing Ethiopean is the inscriptions and the scabbard. The pattern is used in Germany, but mainly in Britain. It should have a sharkskin and silver wire wrapped hilt which has been removed and a polished black leather scabbard with steel throat and chape or an all metal scabbard.
http://www.thesteelsource.com/html/britishlightcavalry.htm is Cavalry, yours looks like naval?
I have a similar shaped blade from the battle of Trafalgar, but it has a brass hilt. I also have a Turkish naval sword with similar decoration on the blade.