Seiko Cal. 4481 - 637

Seiko 4481-637

The 4481-637 is a sought-after Kinetic piece from Seiko's golden era. With its 21mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-0f28a5195e27]

Also known as: Monster, Helmet

Specifications

Movement
Kinetic
Case Material
PVD Black
Case Width
42mm
Case Thickness
13.1mm
Lug Width
21mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Champagne
Jewels
32j
Frequency
28,800 bph
Power Reserve
58 hours
Year
1966

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