Seiko Cal. 6638 - 115

The Seiko 6638-115 represents an important milestone in Seiko's 1966 lineup. With its 21mm lug width and 8.5mm profile, it sits comfortably on most wrists. [seikata-wm-2a694c9c99de]

Also known as: Helmet, Emperor

Specifications

Movement

Spring Drive

Case Material

Stainless Steel

Case Width

35mm

Case Thickness

8.5mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

30m

Dial Color

Burgundy

Jewels

24j

Frequency

36,000 bph

Power Reserve

42 hours

Year

1966

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