Seiko Cal. 6647 - 677

The 6647-677 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6647 caliber with 19j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-7333b200ab1f]

Also known as: Navigator

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

45mm

Case Thickness

8.6mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

170m

Dial Color

Navy

Jewels

19j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1998

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