Seiko Cal. 5674 - 663

The Seiko 5674-663 represents an important milestone in Seiko's 1977 lineup. Powered by the 5674 caliber with 20j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-716dcc5a9aff]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

39mm

Case Thickness

9.6mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

20j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1977

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