Seiko Cal. 6690 - 610

This Hand-Winding model from 1971 features a 44mm Two-Tone case. Powered by the 6690 caliber with 30j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-5b53b0f1c7ff]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Two-Tone

Case Width

44mm

Case Thickness

10.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Cream

Jewels

30j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1971

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