Seiko Cal. 6637 - 306

This Spring Drive model from 1984 features a 34mm Titanium case. It features a Black dial protected by a Mineral crystal and offers 140m of water resistance. [seikata-wm-937a1e78e9eb]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

34mm

Case Thickness

12.1mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

140m

Dial Color

Black

Jewels

22j

Frequency

36,000 bph

Power Reserve

61 hours

Year

1984

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