Seiko Cal. 5637 - 198

The 5637-198 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5637 caliber with 19j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-4d4a082fde68]

Also known as: Sumo, Navigator

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

White

Jewels

19j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1999

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