Seiko Cal. 6621 - 757

This Spring Drive model from 1977 features a 37mm Two-Tone case. With its 18mm lug width and 12.9mm profile, it sits comfortably on most wrists. [seikata-wm-d0c3999c2556]

Also known as: Sumo, Panda

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

37mm

Case Thickness

12.9mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

190m

Dial Color

Silver

Jewels

29j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1977

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