Seiko Cal. 5639 - 676

Released in 1998, the Cal. 5639 with design code 676 was part of Seiko's domestic market collection. Powered by the 5639 caliber with 18j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-3813ef8fc536]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

15.1mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Silver

Jewels

18j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1998

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