Seiko Cal. 5641 - 287

The Seiko 5641-287 represents an important milestone in Seiko's 1969 lineup. With its 20mm lug width and 13.4mm profile, it sits comfortably on most wrists. [seikata-wm-bcfd68f7af91]

Also known as: Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.4mm

Lug Width

20mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

21,600 bph

Power Reserve

56 hours

Year

1969

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