Seiko Cal. 5644 - 888

The Seiko 5644-888 represents an important milestone in Seiko's 1980 lineup. Powered by the 5644 caliber with 36j jewels beating at 28,800 bph, it delivers a 56 hours power reserve. [seikata-wm-428966de025e]

Also known as: Sumo, Goldfeather

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

43mm

Case Thickness

10.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

50m

Dial Color

Green

Jewels

36j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1980

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