Seiko Cal. 3871 - 520

This Spring Drive model from 1974 features a 35mm Stainless Steel case. It features a Blue Sunburst dial protected by a Acrylic crystal and offers 110m of water resistance. [seikata-wm-b8f15f9756b8]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.3mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Blue Sunburst

Jewels

28j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1974

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