Seiko Cal. 5241 - 864

The Seiko 5241-864 represents an important milestone in Seiko's 1970 lineup. With its 19mm lug width and 11.0mm profile, it sits comfortably on most wrists. [seikata-wm-9b60eb3b80c2]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

11.0mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

18j

Frequency

28,800 bph

Power Reserve

69 hours

Year

1970

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