Seiko Cal. 4436 - 331

The Seiko 4436-331 represents an important milestone in Seiko's 1967 lineup. With its 20mm lug width and 12.8mm profile, it sits comfortably on most wrists. [seikata-wm-b98f84e5bdea]

Also known as: Helmet, Rally

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.8mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Blue Sunburst

Jewels

21j

Frequency

28,800 bph

Power Reserve

51 hours

Year

1967

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