Seiko Cal. 6687 - 693

The Seiko 6687-693 represents an important milestone in Seiko's 1975 lineup. With its 20mm lug width and 15.5mm profile, it sits comfortably on most wrists. [seikata-wm-8c7a4e539cec]

Also known as: Sumo, World Timer

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

15.5mm

Lug Width

20mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

19j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1975

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