Seiko Cal. 6187 - 487

This Spring Drive model from 1984 features a 40mm Stainless Steel case. Powered by the 6187 caliber with 31j jewels beating at 36,000 bph, it delivers a 60 hours power reserve. [seikata-wm-e2743933ba1a]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

10.7mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Black

Jewels

31j

Frequency

36,000 bph

Power Reserve

60 hours

Year

1984

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