Seiko Cal. 3890 - 912

The Seiko 3890-912 represents an important milestone in Seiko's 1987 lineup. Powered by the 3890 caliber with 21j jewels beating at 36,000 bph, it delivers a 69 hours power reserve. [seikata-wm-d5f9b8f2701f]

Also known as: Turtle, Sea Horse

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.4mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

36,000 bph

Power Reserve

69 hours

Year

1987

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