Seiko Cal. 6657 - 860

This Quartz model from 1972 features a 40mm Two-Tone case. With its 21mm lug width and 9.6mm profile, it sits comfortably on most wrists. [seikata-wm-f2026d0ea47a]

Also known as: Emperor

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

40mm

Case Thickness

9.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

White

Jewels

36j

Frequency

36,000 bph

Power Reserve

63 hours

Year

1972

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