This is a 220mm pattern welded gyuto, the steels used are 1095/15n20. The pattern used for this knife is an intricate multibar twist similar to a Turkish twist. This knife has a compound S-grind, which has a hollow along the middle of the blade that aids with food release. The grind on this knife would be my typical of my normal midweight grind. The handle of this knife is composed of exhibition grade Amboyna Burl and an African Blackwood ferrule. The average HRC of this knife is 62/63. 
Specs:
Blade Length: 220mm
Heel Height: 60mm
Handle Length : 140mm
Width of spine out of handle: 3.44mm
Width of spine halfway down: 2.54mm
Width of spine 4cm from tip: 1.49mm
Width of spine 2cm from tip: 1.31mm
Overall weight: 209g