Japanese Cavalry Trooper's Saber Pattern 1899 (aka Type 32), circa 1899 through WWII; machine made blades with serial numbers on the blade ricasso and scabbard throat. Steel hilt and on later variants the back strap is checkered as are the wood grips. There is usually a leather finger loop on the inside of the guard, but this is usually missing from examples when found.
It is very similar to the Type 25, circa 1892, the main difference being the Type 25 has a brass hilt and plain wood grip. The blades have a long, wide fuller running the full the entire length.
The scabbards are steel with a single hanger suspension ring.
These are very commonly mislabeled as 1886 cavalry trooper's sabers (as found in Fuller and Gregory's Military Swords of Japan 1868-1945). Recent research has shown this to be erroneous.