Seiko Cal. 5637 - 225

The 5637-225 is a sought-after Solar piece from Seiko's golden era. Powered by the 5637 caliber with 29j jewels beating at 36,000 bph, it delivers a 57 hours power reserve. [seikata-wm-455aa0c6a530]

Also known as: Monster, Sumo

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

38mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Cream

Jewels

29j

Frequency

36,000 bph

Power Reserve

57 hours

Year

1976

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