Seiko Cal. 5639 - 337

Seiko 5639-337

Released in 1987, the Cal. 5639 with design code 337 was part of Seiko's domestic market collection. With its 18mm lug width and 14.9mm profile, it sits comfortably on most wrists. [seikata-wm-956cbf8d041c]

Also known as: Navigator, Crown

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
43mm
Case Thickness
14.9mm
Lug Width
18mm
Crystal
Mineral
Bezel
Rotating
Water Resistance
170m
Dial Color
Blue Sunburst
Jewels
36j
Frequency
28,800 bph
Power Reserve
50 hours
Year
1987

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