Seiko Cal. 6657 - 486

The Seiko 6657-486 represents an important milestone in Seiko's 1974 lineup. It features a Cream dial protected by a Hardlex crystal and offers 170m of water resistance. [seikata-wm-2093a9518b48]

Also known as: Bullhead

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

41mm

Case Thickness

13.5mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

170m

Dial Color

Cream

Jewels

21j

Frequency

21,600 bph

Power Reserve

52 hours

Year

1974

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