Seiko Cal. 6631 - 182

Seiko 6631-182

This Automatic model from 1970 features a 38mm Stainless Steel case. With its 21mm lug width and 12.2mm profile, it sits comfortably on most wrists. [seikata-wm-11e2f99298e4]

Also known as: Helmet, Sportsmatic

Specifications

Movement
Automatic
Case Material
Stainless Steel
Case Width
38mm
Case Thickness
12.2mm
Lug Width
21mm
Crystal
Hardlex
Bezel
Bidirectional
Water Resistance
130m
Dial Color
Black
Jewels
35j
Frequency
21,600 bph
Power Reserve
66 hours
Year
1970

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