Seiko Cal. 6641 - 450

The Seiko 6641-450 represents an important milestone in Seiko's 1971 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-8ac638ceb115]

Also known as: Navigator, Crown

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

10.9mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Silver

Jewels

23j

Frequency

21,600 bph

Power Reserve

54 hours

Year

1971

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