Seiko Cal. 6631 - 920

Seiko 6631-920

The 6631-920 is a sought-after Kinetic piece from Seiko's golden era. With its 21mm lug width and 10.9mm profile, it sits comfortably on most wrists. [seikata-wm-759f341a47f6]

Also known as: Samurai, Sea Horse

Specifications

Movement
Kinetic
Case Material
Stainless Steel
Case Width
39mm
Case Thickness
10.9mm
Lug Width
21mm
Crystal
Acrylic
Bezel
Inner Rotating
Water Resistance
170m
Dial Color
Navy
Jewels
23j
Frequency
28,800 bph
Power Reserve
38 hours
Year
1973

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