Seiko Cal. 5649 - 731

The Seiko 5649-731 represents an important milestone in Seiko's 1980 lineup. Powered by the 5649 caliber with 18j jewels beating at 28,800 bph, it delivers a 67 hours power reserve. [seikata-wm-8631167c9f4c]

Also known as: Golden Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

13.6mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Silver

Jewels

18j

Frequency

28,800 bph

Power Reserve

67 hours

Year

1980

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