Deer Fuchikashira Thick TANTO, with Kozuka Kogai, Late Edo period mumei

The Shakudo Ishimeji Fuchikashira features a deer design.
It comes with a silver-decorated habaki with an unusual pattern.
The blade is very thick.
Mumei Shinshinto.

Signature : Mumei (Unsigned)
Nagasa : 252mm (9.92 in.) 
Sori : 1mm (0.04 in.) 
Total length : 470mm (18.50 in.) 
Motohaba : 28.3mm (1.11 in.) 
Sakihaba : 21.1mm (0.83 in.) 
Motokasane : 8.6mm (0.34 in.) 
Sakikasane : 6.5mm (0.26 in.) 
Blade Weight : 239g
Total Weight : 621g