Seiko Cal. 5639 - 311

The Seiko 5639-311 represents an important milestone in Seiko's 1997 lineup. Powered by the 5639 caliber with 24j jewels beating at 28,800 bph, it delivers a 63 hours power reserve. [seikata-wm-ff5ae969b799]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

44mm

Case Thickness

14.6mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Champagne

Jewels

24j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1997

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