Seiko Cal. 6619 - 312

This Spring Drive model from 1971 features a 37mm Hardlex-Coated Steel case. With its 21mm lug width and 9.8mm profile, it sits comfortably on most wrists. [seikata-wm-0abe6e1b2dc7]

Also known as: Sumo, Bullhead

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

9.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Burgundy

Jewels

24j

Frequency

28,800 bph

Power Reserve

61 hours

Year

1971

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