Seiko Cal. 6661 - 543

This Spring Drive model from 1978 features a 44mm Titanium case. With its 19mm lug width and 8.2mm profile, it sits comfortably on most wrists. [seikata-wm-6a1825e1466c]

Also known as: Sumo, Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

White

Jewels

33j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1978

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