Seiko Cal. 6639 - 723

The Seiko 6639-723 represents an important milestone in Seiko's 1993 lineup. It features a Cream dial protected by a Sapphire crystal and offers 100m of water resistance. [seikata-wm-7c8e3f8de0e5]

Also known as: Sea Horse

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

14.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

100m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1993

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