Seiko Cal. 4436 - 879

This Automatic model from 1973 features a 38mm Hardlex-Coated Steel case. Powered by the 4436 caliber with 17j jewels beating at 21,600 bph, it delivers a 38 hours power reserve. [seikata-wm-4e800158aa88]

Also known as: Sportsmatic, World Timer

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

12.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Champagne

Jewels

17j

Frequency

21,600 bph

Power Reserve

38 hours

Year

1973

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