Seiko Cal. 6638 - 356

The Seiko 6638-356 represents an important milestone in Seiko's 1997 lineup. Powered by the 6638 caliber with 26j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-cb0fd2e02916]

Also known as: Turtle

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

14.7mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

90m

Dial Color

Cream

Jewels

26j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1997

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