Seiko Cal. 5637 - 693

Seiko 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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seikata-wm-bd500d766f83