Seiko Cal. 3840 - 338

This Spring Drive model from 1977 features a 43mm Gold-Plated case. With its 20mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-0dc7eabb2d0b]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

10.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

90m

Dial Color

White

Jewels

22j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1977

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