Seiko Cal. 6688 - 638

The Seiko 6688-638 represents an important milestone in Seiko's 1973 lineup. It features a Navy dial protected by a Hardlex crystal and offers 40m of water resistance. [seikata-wm-b6f711e57d25]

Also known as: Pogue, UFO

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

12.2mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

40m

Dial Color

Navy

Jewels

33j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1973

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