Seiko Cal. 6638 - 804

The Seiko 6638-804 represents an important milestone in Seiko's 1981 lineup. Powered by the 6638 caliber with 36j jewels beating at 21,600 bph, it delivers a 55 hours power reserve. [seikata-wm-01a8148687c3]

Also known as: Pogue, Rally

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

46mm

Case Thickness

12.9mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

White

Jewels

36j

Frequency

21,600 bph

Power Reserve

55 hours

Year

1981

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