Seiko Cal. 6691 - 139

Released in 1965, the Cal. 6691 with design code 139 was part of Seiko's domestic market collection. The Inner Rotating bezel and 46mm case give it a distinctive presence on the wrist. [seikata-wm-1ccb1bbe0867]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

46mm

Case Thickness

9.5mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Silver

Jewels

24j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1965

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