Seiko Cal. 5637 - 489

The 5637-489 is a sought-after Quartz piece from Seiko's golden era. Powered by the 5637 caliber with 28j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-dd7ca5f4e1a9]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Green

Jewels

28j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1992

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