Seiko Cal. 3861 - 640

This Quartz model from 1984 features a 46mm Stainless Steel case. Powered by the 3861 caliber with 35j jewels beating at 36,000 bph, it delivers a 48 hours power reserve. [seikata-wm-e8854c831b3d]

Also known as: Helmet, Bellmatic

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

15.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

35j

Frequency

36,000 bph

Power Reserve

48 hours

Year

1984

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