Seiko Cal. 6616 - 684

This Spring Drive model from 1966 features a 40mm Two-Tone case. With its 20mm lug width and 13.1mm profile, it sits comfortably on most wrists. [seikata-wm-a870cceb60be]

Also known as: World Timer, Emperor

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

40mm

Case Thickness

13.1mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

150m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1966

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