Seiko Cal. 5640 - 197

The Seiko 5640-197 represents an important milestone in Seiko's 1966 lineup. With its 22mm lug width and 15.4mm profile, it sits comfortably on most wrists. [seikata-wm-86c3824161b3]

Also known as: Pogue, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

42mm

Case Thickness

15.4mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

32j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1966

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