Seiko Cal. 3870 - 700

This Spring Drive model from 1978 features a 42mm Two-Tone case. With its 22mm lug width and 13.0mm profile, it sits comfortably on most wrists. [seikata-wm-93d7757e459d]

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

13.0mm

Lug Width

22mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Black

Jewels

19j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1978

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