Seiko Cal. 5613 - 836

This Spring Drive model from 1988 features a 41mm Titanium case. With its 18mm lug width and 11.4mm profile, it sits comfortably on most wrists. [seikata-wm-7e161fc7d944]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

41mm

Case Thickness

11.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

26j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1988

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