Seiko Cal. 6331 - 977

Seiko 6331-977

This Spring Drive model from 1974 features a 42mm Gold-Plated case. With its 22mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-887b0a6220fb]

Also known as: World Timer, Crown

Specifications

Movement
Spring Drive
Case Material
Gold-Plated
Case Width
42mm
Case Thickness
11.4mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Bidirectional
Water Resistance
200m
Dial Color
Silver
Jewels
33j
Frequency
28,800 bph
Power Reserve
45 hours
Year
1974

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