Seiko Cal. 6621 - 475

This Spring Drive model from 1971 features a 37mm Stainless Steel case. With its 21mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-bdab4e727f4d]

Also known as: Monster, Sumo

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.5mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Navy

Jewels

27j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1971

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