Seiko Cal. 6644 - 446

This Spring Drive model from 1967 features a 42mm Stainless Steel case. With its 18mm lug width and 12.5mm profile, it sits comfortably on most wrists. [seikata-wm-0a771a6d11ec]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.5mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

130m

Dial Color

Navy

Jewels

29j

Frequency

28,800 bph

Power Reserve

68 hours

Year

1967

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