Seiko Cal. 5637 - 244

The Seiko 5637-244 represents an important milestone in Seiko's 1991 lineup. Powered by the 5637 caliber with 23j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-24d434e2b9be]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Burgundy

Jewels

23j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1991

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