Seiko Cal. 5231 - 436

This Solar model from 1978 features a 40mm Hardlex-Coated Steel case. With its 20mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-e71bbf516e8d]

Also known as: Silverwave, Arnie

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

40mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Black

Jewels

27j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1978

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