Seiko Cal. 5284 - 100

The Seiko 5284-100 represents an important milestone in Seiko's 1971 lineup. With its 21mm lug width and 12.1mm profile, it sits comfortably on most wrists. [seikata-wm-69cddcf166bb]

Also known as: Tuna, Helmet

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

41mm

Case Thickness

12.1mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

110m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1971

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