Seiko Cal. 5660 - 757

The Seiko 5660-757 represents an important milestone in Seiko's 1971 lineup. It features a Black dial protected by a Hardlex crystal and offers 140m of water resistance. [seikata-wm-c6e06150d7d0]

Also known as: Navigator

Specifications

Movement

Solar

Case Material

PVD Black

Case Width

36mm

Case Thickness

14.9mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

140m

Dial Color

Black

Jewels

34j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1971

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