Seiko Cal. 5678 - 933

The Seiko 5678-933 represents an important milestone in Seiko's 1976 lineup. With its 21mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-416c8ce613a3]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.6mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Blue Sunburst

Jewels

36j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1976

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