Seiko Cal. 5637 - 489

Seiko 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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