Seiko Cal. 5637 - 990

This Automatic model from 1991 features a 37mm Stainless Steel case. It features a Champagne dial protected by a Mineral crystal and offers 30m of water resistance. [seikata-wm-1061981c06a8]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

23j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1991

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