Seiko Cal. 5660 - 612

The Seiko 5660-612 represents an important milestone in Seiko's 1974 lineup. Powered by the 5660 caliber with 36j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-dcc3a95e7468]

Also known as: Navigator, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

36mm

Case Thickness

9.5mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

160m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1974

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