Seiko Cal. 3864 - 931

The Seiko 3864-931 represents an important milestone in Seiko's 1988 lineup. With its 18mm lug width and 11.5mm profile, it sits comfortably on most wrists. [seikata-wm-f951e1030eac]

Also known as: Bellmatic, World Timer

Specifications

Movement

Solar

Case Material

Titanium

Case Width

43mm

Case Thickness

11.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Cream

Jewels

35j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1988

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