Seiko Cal. 5240 - 638

The Seiko 5240-638 represents an important milestone in Seiko's 1976 lineup. With its 22mm lug width and 15.0mm profile, it sits comfortably on most wrists. [seikata-wm-64b01b3e9e91]

Also known as: Bullhead

Specifications

Movement

Kinetic

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Green

Jewels

35j

Frequency

21,600 bph

Power Reserve

43 hours

Year

1976

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