Seiko Cal. 5257 - 138

The Seiko 5257-138 represents an important milestone in Seiko's 1966 lineup. With its 19mm lug width and 10.2mm profile, it sits comfortably on most wrists. [seikata-wm-0a74b350ebe4]

Also known as: Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

39mm

Case Thickness

10.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

50m

Dial Color

White

Jewels

33j

Frequency

28,800 bph

Power Reserve

50 hours

Year

1966

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