Seiko Cal. 6657 - 691

The 6657-691 is a sought-after Kinetic piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 70m of water resistance. [seikata-wm-3bb819142ada]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Titanium

Case Width

34mm

Case Thickness

12.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

70m

Dial Color

Blue Sunburst

Jewels

17j

Frequency

28,800 bph

Power Reserve

58 hours

Year

1976

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