Seiko Cal. 4491 - 534

The Seiko 4491-534 represents an important milestone in Seiko's 1971 lineup. With its 20mm lug width and 15.9mm profile, it sits comfortably on most wrists. [seikata-wm-c3b5d43b22c6]

Also known as: Helmet, Baby Tuna

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

45mm

Case Thickness

15.9mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

Green

Jewels

25j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1971

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