Seiko Cal. 5218 - 431

This Spring Drive model from 1979 features a 44mm Gold-Plated case. With its 19mm lug width and 8.3mm profile, it sits comfortably on most wrists. [seikata-wm-2959e80f2306]

Also known as: Sumo, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Silver

Jewels

35j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1979

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