Seiko Cal. 5644 - 623

The Seiko 5644-623 represents an important milestone in Seiko's 1988 lineup. Powered by the 5644 caliber with 18j jewels beating at 28,800 bph, it delivers a 51 hours power reserve. [seikata-wm-5489b39b9f3e]

Also known as: Monster, Arnie

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

46mm

Case Thickness

15.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

190m

Dial Color

Green

Jewels

18j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1988

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