Seiko Cal. 6690 - 729

The 6690-729 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6690 caliber with 28j jewels beating at 21,600 bph, it delivers a 36 hours power reserve. [seikata-wm-85efa5cc6ca0]

Also known as: UFO

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

15.8mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Navy

Jewels

28j

Frequency

21,600 bph

Power Reserve

36 hours

Year

1994

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