This elegant Seiko dress watch dates from January 1981 (serial number 10xxxx ) and represents the classic, minimalist design language of the early Seiko quartz era. The flat rectangular case, the light-colored dial with Roman numerals, and the newly fitted original Seiko leather strap give it a timeless, stylish appearance – ideal as a discreet dress watch.
The watch has been fitted with a new battery (replacement November 2025) and is ready for immediate use.
Special features
Classic Seiko dress watch from 1981
Very flat housing (6.1 mm)
Discreet cream-colored dial with Roman numerals
New original Seiko leather strap (NP in Japan: ¥3,630)
Japanese quartz movement of the 6400 series (very reliable and robust)
Condition
The watch is in good, fully functional condition. Typical signs of wear:
Gilding with visible vintage patina
Glass with a few minor scratches
The dial is clean and without any significant defects.
New original Seiko leather strap fitted
A very authentic vintage Seiko with a charming aura.
Technical data
Model: Seiko Quartz 6431-5090
Serial number: 10xxxx (Production January 1981)
Movement: Seiko Quartz (6400 series)
Case: Gold-plated base metal case, stainless steel back
Mass:
Width: 27.2 mm
Height (top-bottom): 32 mm
Lug-to-lug: 38.9 mm
Case height: 6.1 mm
Lug width: 17 mm
Strap: New original Seiko leather strap, brown, crocodile embossing
Weight: 25 g (including strap)
Water resistance:Water Resistant (Vintage – see note below)
Notes
Warranty (used)
This is a used item. The limitation period for claims based on defects (statutory warranty) is 12 months from delivery .
Notice
As this is a pre-owned watch, water resistance cannot be guaranteed. To protect the movement, the watch should not come into contact with water or moisture.
