Seiko Cal. 5684 - 878

The Seiko 5684-878 represents an important milestone in Seiko's 1972 lineup. With its 21mm lug width and 15.3mm profile, it sits comfortably on most wrists. [seikata-wm-ccdec70c984b]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

15.3mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1972

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