Seiko Cal. 5637 - 111

The 5637-111 is a sought-after Automatic piece from Seiko's golden era. Powered by the 5637 caliber with 19j jewels beating at 21,600 bph, it delivers a 65 hours power reserve. [seikata-wm-796f34226c73]

Also known as: Monster, Sumo

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

37mm

Case Thickness

9.5mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Green

Jewels

19j

Frequency

21,600 bph

Power Reserve

65 hours

Year

1971

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