Seiko Cal. 6631 - 784

The 6631-784 is a sought-after Hand-Winding piece from Seiko's golden era. The Bidirectional bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-ff65045cdedb]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

39mm

Case Thickness

8.9mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

100m

Dial Color

Silver

Jewels

19j

Frequency

36,000 bph

Power Reserve

39 hours

Year

1995

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