MASAMUNE 正宗 signed Hirazukuri Sunnobi-Tanto in Shirasaya, Homarekizu 誉傷

There is a Homarekizu on the side of the blade.
This is a cut scar that is likely from defending against an enemy sword attack with the blade during battle.

Signature : Masamune
Nagasa : 360mm (14.17 in.) 
Sori : 9mm (0.35 in.) 
Total length : 540mm (21.26 in.) 
Motohaba : 30.4mm (1.20 in.) 
Sakihaba : 25.1mm (0.99 in.) 
Motokasane : 4.6mm (0.18 in.) 
Sakikasane : 3mm (0.12 in.) 
Blade Weight : 249g
Total Weight : 449g