Seiko Cal. 5647 - 438

The Seiko 5647-438 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-db0e46ab7990]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

15.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

190m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

71 hours

Year

1971

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