Seiko Cal. 5637 - 139

The Seiko 5637-139 represents an important milestone in Seiko's 1977 lineup. It features a Green dial protected by a Mineral crystal and offers 70m of water resistance. [seikata-wm-a71dd062f2f9]

Also known as: UFO

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

11.4mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1977

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