Seiko Cal. 3870 - 921

This Automatic model from 1967 features a 38mm Stainless Steel case. Powered by the 3870 caliber with 24j jewels beating at 28,800 bph, it delivers a 40 hours power reserve. [seikata-wm-1a61a99f1daf]

Also known as: Bullhead, Golden Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

38mm

Case Thickness

10.2mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

24j

Frequency

28,800 bph

Power Reserve

40 hours

Year

1967

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