Seiko Cal. 5687 - 310

Released in 1991, the Cal. 5687 with design code 310 was part of Seiko's domestic market collection. With its 18mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-199ed48bc871]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

170m

Dial Color

Cream

Jewels

18j

Frequency

28,800 bph

Power Reserve

45 hours

Year

1991

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