Finally, a GS signed buckle for your GRAND SEIKO in a standard 16mm size which can be fitted to any type of modern style watch strap with a 16mm buckle end. Part is made from stainless steel.
These are newly manufactured by my company, Vintage Time Australia, and ARE NOT a vintage part.
Very easy to fit, just uses a standard spring bar.
My blog site is here -
www.vintagetimeaustralia.com