Seiko Cal. 3817 - 635

This Spring Drive model from 1990 features a 35mm Two-Tone case. It features a Navy dial protected by a Acrylic crystal and offers 40m of water resistance. [seikata-wm-e3f5fb1e4512]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

35mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1990

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