Seiko Cal. 6635 - 788

Released in 1984, the Cal. 6635 with design code 788 was part of Seiko's domestic market collection. With its 21mm lug width and 8.0mm profile, it sits comfortably on most wrists. [seikata-wm-de35dd1fc872]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

36mm

Case Thickness

8.0mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1984

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