Seiko Cal. 0787 - 138

The Seiko 0787-138 represents an important milestone in Seiko's 1969 lineup. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-87b6846953ce]

Also known as: Helmet, World Timer

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

39mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

31j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1969

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