Seiko Cal. 6637 - 957

Seiko 6637-957

This Automatic model from 1987 features a 41mm Hardlex-Coated Steel case. With its 20mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-4a1a1b9135c5]

Also known as: Baby Tuna

Specifications

Movement
Automatic
Case Material
Hardlex-Coated Steel
Case Width
41mm
Case Thickness
13.1mm
Lug Width
20mm
Crystal
Hardlex
Bezel
Rotating
Water Resistance
170m
Dial Color
White
Jewels
21j
Frequency
28,800 bph
Power Reserve
55 hours
Year
1987

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