Shinogi-Usu-Nomi Japanese Hand Made Paring Dovetail Chisel By Yamamasa

Smith name: Unknown

Brand name: Yama masa(According to some online information, it is the brand of Yusho Shoten in Asakusa, Tokyo before World War II.)

Steel: Carbon Steel

Blade width: 21mm

Blade thickness: Blade Bottom(about 6.0mm)，Top of Blade（about 4.8mm）

Manufacture Era: Before 1945

Weight: 107g

Blade Angles: 24°

Total length: 275mm

Neck length: 60mm

Blade length: 63mm

Handle length: 135mm

Types of wooden handles：Japanese White Oak（Shirakashi）

Accessories：—

Additional Information: Used. 

I am impressed by the steel used to sharpen this chisel. It is very tough and does not look like traditional carbon steel, it may be a special steel.

The mark of the Tokyo Chisel Smith Guild before World War II.