Seiko Cal. 6321 - 637

This Spring Drive model from 1966 features a 46mm Titanium case. With its 18mm lug width and 12.0mm profile, it sits comfortably on most wrists. [seikata-wm-4388195c52f9]

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

46mm

Case Thickness

12.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

41 hours

Year

1966

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