There are both Grand Seiko and Seikomatic for similar reference number.
This is the Grand Seiko with GS medal on case back.
【Warranty】
The watch is completely serviced by our watchmaker in June 2018.
A few parts are replaced with genuine Seiko parts.
Comes with 6 months warranty.
Brand: SEIKO
Model: GRAND SEIKO
Ref: 6246-9001
Year: 1967
Movement: Automatic Cal.6246A
Case: 37mm (without crown)
Material: Stainless Steel
Strap: 19mm
Includes: Leather Strap