Seiko Cal. 6688 - 438

The Seiko 6688-438 represents an important milestone in Seiko's 1996 lineup. Powered by the 6688 caliber with 29j jewels beating at 28,800 bph, it delivers a 54 hours power reserve. [seikata-wm-6dbd78db0150]

Also known as: Helmet, Arnie

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

38mm

Case Thickness

12.4mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

29j

Frequency

28,800 bph

Power Reserve

54 hours

Year

1996

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