Seiko Cal. 4436 - 441

Seiko 4436-441

This Spring Drive model from 1972 features a 37mm Stainless Steel case. Powered by the 4436 caliber with 27j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-df490e105e35]

Also known as: Bullhead, UFO

Specifications

Movement
Spring Drive
Case Material
Stainless Steel
Case Width
37mm
Case Thickness
15.7mm
Lug Width
20mm
Crystal
Mineral
Bezel
Inner Rotating
Water Resistance
90m
Dial Color
White
Jewels
27j
Frequency
28,800 bph
Power Reserve
66 hours
Year
1972

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seikata-wm-df490e105e35