Seiko Cal. 6159 - 631

The Seiko 6159-631 represents an important milestone in Seiko's 1976 lineup. Powered by the 6159 caliber with 36j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-9fe0f5bc2c1f]

Also known as: World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Burgundy

Jewels

36j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1976

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