Seiko Cal. 5637 - 693

The Seiko 5637-693 represents an important milestone in Seiko's 1999 lineup. Powered by the 5637 caliber with 17j jewels beating at 36,000 bph, it delivers a 40 hours power reserve. [seikata-wm-bd500d766f83]

Also known as: Bullhead, UFO

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

40mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

36,000 bph

Power Reserve

40 hours

Year

1999

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