Seiko Cal. 3840 - 285

This Spring Drive model from 1972 features a 46mm Hardlex-Coated Steel case. With its 19mm lug width and 8.9mm profile, it sits comfortably on most wrists. [seikata-wm-28ac02f72d4d]

Also known as: Goldfeather, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

8.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

70m

Dial Color

Black

Jewels

32j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1972

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