Seiko Cal. 5638 - 506

This Spring Drive model from 1994 features a 39mm Two-Tone case. The Inner Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-6cd1a0cd6bd0]

Also known as: World Timer, Arnie

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

18j

Frequency

21,600 bph

Power Reserve

50 hours

Year

1994

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