Seiko Cal. 3878 - 687

This Automatic model from 1967 features a 35mm Stainless Steel case. Powered by the 3878 caliber with 32j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-2793db902ef9]

Also known as: Helmet, Arnie

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Cream

Jewels

32j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1967

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