Seiko Cal. 3870 - 683

The Seiko 3870-683 represents an important milestone in Seiko's 1980 lineup. Powered by the 3870 caliber with 24j jewels beating at 21,600 bph, it delivers a 69 hours power reserve. [seikata-wm-a5554e9f28fb]

Also known as: Sea Horse, Golden Tuna

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

39mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Black

Jewels

24j

Frequency

21,600 bph

Power Reserve

69 hours

Year

1980

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