Seiko Cal. 6691 - 337

The Seiko 6691-337 represents an important milestone in Seiko's 1971 lineup. The Coin-Edge bezel and 45mm case give it a distinctive presence on the wrist. [seikata-wm-0e71b8550274]

Also known as: Shogun, UFO

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

12.2mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

150m

Dial Color

Burgundy

Jewels

17j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1971

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