Japanese era Meiji Army officer's sword in Kyu-Gunto model 1877

Description

It is a Japanese military officer's sword from the Meiji period, Kyu-Gunto model 1877.
An interesting fact and a rarity is that the 1877 model uses a blade made in the MUROMASCHI period and is signed with the name of the blacksmith;
TSUGOHIRO made around 1550.
The blade is old polished, shows minor scratches but is free from rust, stains and in good condition.
The tempering line is wavy, kogunome temperament and deep temperament at the end.
Forged grain is tight, no holes, no blisters and no forging missing.
There are no bends, scratches, cracks and the cutting edge is sharp.
Steel scabbard, nickel plated
, in good condition.
The handle is tight fit, the brass wire wrap is not cut, not loose and in good condition.
The lock mechanism works fine.
The sword was the property of an officer of princely origin, as evidenced by the ancestral mark of the MON clans;
AKIMOTO, ODA and ARIMA, located on the handle.
The sword's measurement:
-    the whole length: 80,5 cm
-    the length without scabbard: 75,5 cm
-    the length of blade/ brand: 56,8 cm
-    the
width at Habaka; 26 mm
-    the
width at Yokote: 20 mm.
-    the mune Thickness: 6,35 mm.
-   the curvature - Sori 17,1 mm.
Hada – KO-ITAME
Hamon – GUNOME MIDARE
Nakago – KURIJIRI
Blade in SHINOGI ZUKURI type.
Habaka -  copper
Sygnature:
TSUGOHIRO
I'm no expert in Japanese
reading
markings on the Nakago.
If I make a mistake in translation, please correct me.
International Priority (with tracking number) shipping cost:
European Union countries: 50$ USA
United States and Canada: 60$ USA