Seiko Cal. 6331 - 310

This Automatic model from 1966 features a 40mm PVD Black case. With its 21mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-228a300c2783]

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

40mm

Case Thickness

8.3mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

140m

Dial Color

White

Jewels

25j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1966

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