Seiko Cal. 6637 - 452

Seiko 6637-452

This Hand-Winding model from 1984 features a 42mm Two-Tone case. With its 18mm lug width and 10.8mm profile, it sits comfortably on most wrists. [seikata-wm-901667a77f2f]

Also known as: Tuna, Navigator

Specifications

Movement
Hand-Winding
Case Material
Two-Tone
Case Width
42mm
Case Thickness
10.8mm
Lug Width
18mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
90m
Dial Color
Navy
Jewels
27j
Frequency
21,600 bph
Power Reserve
36 hours
Year
1984

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