Seiko Cal. 5648 - 302

The Seiko 5648-302 represents an important milestone in Seiko's 1990 lineup. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-c2d7b4822e3b]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

28j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1990

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