Seiko Cal. 3870 - 156

The Seiko 3870-156 represents an important milestone in Seiko's 1968 lineup. Powered by the 3870 caliber with 32j jewels beating at 21,600 bph, it delivers a 42 hours power reserve. [seikata-wm-6cbd85e5025f]

Also known as: Shogun, Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

39mm

Case Thickness

13.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

90m

Dial Color

Burgundy

Jewels

32j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1968

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