Seiko Cal. 6637 - 604

Seiko 6637-604

This Hand-Winding model from 1979 features a 45mm Hardlex-Coated Steel case. The Rotating bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-ceab8c955da9]

Also known as: Helmet

Specifications

Movement
Hand-Winding
Case Material
Hardlex-Coated Steel
Case Width
45mm
Case Thickness
12.0mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
110m
Dial Color
Black
Jewels
18j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1979

Related Models

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