Seiko Cal. 5666 - 641

The 5666-641 is a sought-after Kinetic piece from Seiko's golden era. It features a Blue Sunburst dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-f80fa48e1a2a]

Also known as: Sea Horse, Baby Tuna

Specifications

Movement

Kinetic

Case Material

PVD Black

Case Width

44mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Blue Sunburst

Jewels

24j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1977

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