Seiko Cal. 6690 - 661

This Spring Drive model from 1969 features a 44mm Titanium case. The Rotating bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-9d2958e8094c]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

44mm

Case Thickness

13.1mm

Lug Width

18mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

170m

Dial Color

Burgundy

Jewels

32j

Frequency

36,000 bph

Power Reserve

65 hours

Year

1969

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