Seiko Cal. 6640 - 666

The 6640-666 is a sought-after Spring Drive piece from Seiko's golden era. It features a Silver dial protected by a Sapphire crystal and offers 130m of water resistance. [seikata-wm-0c34a0755a5a]

Also known as: Sea Horse

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

11.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

130m

Dial Color

Silver

Jewels

19j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1972

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