Seiko Cal. 4455 - 641

Seiko 4455-641

The Seiko 4455-641 represents an important milestone in Seiko's 1970 lineup. Powered by the 4455 caliber with 18j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-123ed9df511f]

Also known as: Helmet, Rally

Specifications

Movement
Spring Drive
Case Material
Titanium
Case Width
42mm
Case Thickness
14.2mm
Lug Width
20mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
30m
Dial Color
Blue Sunburst
Jewels
18j
Frequency
36,000 bph
Power Reserve
36 hours
Year
1970

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