Seiko Cal. 0798 - 661

This Spring Drive model from 1971 features a 37mm Two-Tone case. With its 18mm lug width and 8.7mm profile, it sits comfortably on most wrists. [seikata-wm-ecc9e2b82fcf]

Also known as: Sumo, Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

8.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

140m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

71 hours

Year

1971

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