Seiko Cal. 5251 - 478

The Seiko 5251-478 represents an important milestone in Seiko's 1968 lineup. With its 21mm lug width and 11.1mm profile, it sits comfortably on most wrists. [seikata-wm-94341e70838e]

Also known as: Helmet, UFO

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

43mm

Case Thickness

11.1mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

40m

Dial Color

Silver

Jewels

17j

Frequency

28,800 bph

Power Reserve

63 hours

Year

1968

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