Seiko Cal. 6690 - 401

The Seiko 6690-401 represents an important milestone in Seiko's 1974 lineup. Powered by the 6690 caliber with 31j jewels beating at 28,800 bph, it delivers a 37 hours power reserve. [seikata-wm-9f7d40867c82]

Also known as: UFO

Specifications

Movement

Solar

Case Material

Gold-Plated

Case Width

46mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

50m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

37 hours

Year

1974

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