GRAND SEIKO 5645-8000

’56GS’

Vintage Grand Seiko runs deep with a varying multitude of case shapes, dials, movements and bracelets, there are dozens of options and references. The 5645/6-8000 came in two variants; silver and a linen textured dial, with the latter being shrouded in a bit of speculation.
 

Originally, this grey linen dial was actually a rich dark blue. It’s been widely accepted that over time nearly all dials coincidently faded to a uniform grey tone. This is merely a theory but to support it are a few “new old stock” 5645/6-8000’s that have been discovered over the last 5-6 years which still displayed a rich, dark blue linen dial. 


Speculation aside, this here is an excellent grey-dialed example with a bit of Seiko lore tied directly to it. It appears unpolished and sports only light general wear throughout the case and original bracelet.

 
 

Essentials

MAKER: Grand Seiko

MODEL: 56GS

YEAR: 1972 (December)

CASE MATERIAL: Stainless steel

CASE WIDTH: 36mm

LUG TO LUG LENGTH: 42mm

LUG WIDTH: 18mm

HEIGHT: 12mm, case back to top of crystal

CASE SERIAL: 2D1024

CRYSTAL: Mineral glass

LUME: No

FUNCTION: Hours, minutes, seconds, date

MOVEMENT: Seiko cal. 5645 automatic/self-winding

SERVICE HISTORY: February 2021

BRACELET/STRAP: Grand Seiko XQB040

BOX/PAPERS: N/A