Seiko Cal. 6640 - 998

The 6640-998 is a sought-after Kinetic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 50m of water resistance. [seikata-wm-ce9e2a643647]

Also known as: Rally

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

36mm

Case Thickness

13.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

50m

Dial Color

Navy

Jewels

36j

Frequency

21,600 bph

Power Reserve

42 hours

Year

1987

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