Seiko Cal. 6656 - 322

The Seiko 6656-322 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 9.5mm profile, it sits comfortably on most wrists. [seikata-wm-789b5a45a404]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

37mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

24j

Frequency

28,800 bph

Power Reserve

65 hours

Year

1971

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