Seiko Cal. 5637 - 227

This Spring Drive model from 1968 features a 36mm Gold-Plated case. Powered by the 5637 caliber with 35j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-481a7273b7c4]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

10.8mm

Lug Width

22mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Blue Sunburst

Jewels

35j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1968

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