Seiko Cal. 5640 - 827

The Seiko 5640-827 represents an important milestone in Seiko's 1996 lineup. With its 19mm lug width and 14.8mm profile, it sits comfortably on most wrists. [seikata-wm-ecd06d63bb68]

Also known as: Emperor, Flighty

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

45mm

Case Thickness

14.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Burgundy

Jewels

18j

Frequency

21,600 bph

Power Reserve

70 hours

Year

1996

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