Seiko Cal. 6321 - 688

The Seiko 6321-688 represents an important milestone in Seiko's 1965 lineup. With its 18mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-520c151f3b89]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

36mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Navy

Jewels

22j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1965

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