Seiko Cal. 3870 - 630

The Seiko 3870-630 represents an important milestone in Seiko's 1970 lineup. Powered by the 3870 caliber with 29j jewels beating at 21,600 bph, it delivers a 52 hours power reserve. [seikata-wm-d3f3139c60ee]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

30m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1970

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