Seiko Cal. 4450 - 640

Seiko 4450-640

The Seiko 4450-640 represents an important milestone in Seiko's 1990 lineup. Powered by the 4450 caliber with 36j jewels beating at 28,800 bph, it delivers a 45 hours power reserve. [seikata-wm-dbe9633a1642]

Also known as: Helmet, Sea Horse

Specifications

Movement
Spring Drive
Case Material
Hardlex-Coated Steel
Case Width
39mm
Case Thickness
8.2mm
Lug Width
18mm
Crystal
Acrylic
Bezel
Rotating
Water Resistance
40m
Dial Color
White
Jewels
36j
Frequency
28,800 bph
Power Reserve
45 hours
Year
1990

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seikata-wm-dbe9633a1642