Seiko Cal. 5663 - 289

The Seiko 5663-289 represents an important milestone in Seiko's 1965 lineup. With its 21mm lug width and 13.6mm profile, it sits comfortably on most wrists. [seikata-wm-5e40dafe6039]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

46mm

Case Thickness

13.6mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Navy

Jewels

25j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1965

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