Seiko Cal. 6640 - 200

The 6640-200 is a sought-after Quartz piece from Seiko's golden era. It features a Black dial protected by a Sapphire crystal and offers 150m of water resistance. [seikata-wm-3ed52bf10adc]

Also known as: Samurai

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.1mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Black

Jewels

22j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1977

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