Seiko Cal. 5660 - 447

The Seiko 5660-447 represents an important milestone in Seiko's 1979 lineup. Powered by the 5660 caliber with 21j jewels beating at 36,000 bph, it delivers a 37 hours power reserve. [seikata-wm-b74bad4f5967]

Also known as: Rally, Navigator

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

46mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

200m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

37 hours

Year

1979

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