Seiko Cal. 5637 - 684

This Spring Drive model from 1965 features a 38mm Gold-Plated case. It features a Black dial protected by a Mineral crystal and offers 200m of water resistance. [seikata-wm-c5c01bc2becd]

Also known as: World Timer, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Black

Jewels

34j

Frequency

21,600 bph

Power Reserve

72 hours

Year

1965

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