Seiko Cal. 4521 - 748

The Seiko 4521-748 represents an important milestone in Seiko's 1967 lineup. With its 18mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-80fe83f8932f]

Also known as: Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

100m

Dial Color

Cream

Jewels

23j

Frequency

21,600 bph

Power Reserve

64 hours

Year

1967

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