Seiko Cal. 6663 - 356

The Seiko 6663-356 represents an important milestone in Seiko's 1975 lineup. Powered by the 6663 caliber with 30j jewels beating at 21,600 bph, it delivers a 60 hours power reserve. [seikata-wm-b9e26fb781e5]

Also known as: Navigator, Baby Tuna

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

12.1mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

60 hours

Year

1975

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