Seiko Cal. 3870 - 978

The Seiko 3870-978 represents an important milestone in Seiko's 1990 lineup. Powered by the 3870 caliber with 35j jewels beating at 28,800 bph, it delivers a 50 hours power reserve. [seikata-wm-80920a796acb]

Also known as: Helmet, UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

45mm

Case Thickness

11.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1990

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