Seiko Cal. 6631 - 167

The 6631-167 is a sought-after Kinetic piece from Seiko's golden era. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-504c9daba225]

Also known as: Sumo

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

9.3mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

40m

Dial Color

Navy

Jewels

35j

Frequency

28,800 bph

Power Reserve

47 hours

Year

1966

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