Seiko Cal. 5646 - 337

This Spring Drive model from 1979 features a 41mm Gold-Plated case. With its 21mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-c9bc63a8377b]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

12.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

32j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1979

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