Seiko Cal. 6660 - 587

This Spring Drive model from 1973 features a 43mm PVD Black case. The Inner Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-6845dc208ba7]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1973

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