Seiko Cal. 6690 - 711

The 6690-711 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6690 caliber with 34j jewels beating at 21,600 bph, it delivers a 61 hours power reserve. [seikata-wm-4ddb3a9a8e0a]

Also known as: Turtle, Navigator

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Fixed

Water Resistance

180m

Dial Color

Green

Jewels

34j

Frequency

21,600 bph

Power Reserve

61 hours

Year

1970

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