Seiko Cal. 3878 - 613

This Quartz model from 1978 features a 37mm Two-Tone case. With its 20mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-2eb359f2bd55]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

37mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Silver

Jewels

26j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1978

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