Seiko Cal. 6643 - 767

The 6643-767 is a sought-after Spring Drive piece from Seiko's golden era. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-fa4617fbd35a]

Also known as: Pogue, Goldfeather

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

37mm

Case Thickness

10.3mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1991

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