Seiko Cal. 5680 - 644

The 5680-644 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5680 caliber with 25j jewels beating at 21,600 bph, it delivers a 68 hours power reserve. [seikata-wm-10140dbd6cd0]

Also known as: Sumo, Flighty

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

14.1mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

40m

Dial Color

Navy

Jewels

25j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1995

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