Seiko Cal. 0740 - 684

The Seiko 0740-684 represents an important milestone in Seiko's 1969 lineup. With its 22mm lug width and 13.9mm profile, it sits comfortably on most wrists. [seikata-wm-6fa33e65c283]

Also known as: Helmet, Sportsmatic

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

43mm

Case Thickness

13.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1969

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