Seiko Cal. 5659 - 631

The Seiko 5659-631 represents an important milestone in Seiko's 1973 lineup. With its 20mm lug width and 15.6mm profile, it sits comfortably on most wrists. [seikata-wm-fd29c4f99744]

Also known as: Sportsmatic

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

130m

Dial Color

White

Jewels

35j

Frequency

36,000 bph

Power Reserve

52 hours

Year

1973

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