Seiko Cal. 3810 - 443

This Spring Drive model from 1971 features a 34mm Hardlex-Coated Steel case. Powered by the 3810 caliber with 18j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-a7cb9353fd8e]

Also known as: Monster, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

9.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1971

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