Seiko Cal. 3817 - 657

The Seiko 3817-657 represents an important milestone in Seiko's 1972 lineup. It features a Green dial protected by a Acrylic crystal and offers 190m of water resistance. [seikata-wm-44c3a0c16570]

Also known as: Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

35mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

29j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1972

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