Seiko Cal. 5680 - 639

The Seiko 5680-639 represents an important milestone in Seiko's 1975 lineup. Powered by the 5680 caliber with 30j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-e1b7077e60e3]

Also known as: World Timer

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

15.1mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1975

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