Seiko Cal. 5640 - 834

The Seiko 5640-834 represents an important milestone in Seiko's 1990 lineup. With its 18mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-bcedd3db54e0]

Also known as: Emperor

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

42mm

Case Thickness

11.0mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

180m

Dial Color

Silver

Jewels

17j

Frequency

21,600 bph

Power Reserve

51 hours

Year

1990

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