Seiko Cal. 3851 - 687

This Spring Drive model from 1992 features a 46mm Hardlex-Coated Steel case. With its 19mm lug width and 15.7mm profile, it sits comfortably on most wrists. [seikata-wm-81c1f27f7249]

Also known as: Bellmatic, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

15.7mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Silver

Jewels

23j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1992

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