Seiko Cal. 4540 - 915

The Seiko 4540-915 represents an important milestone in Seiko's 1971 lineup. With its 18mm lug width and 10.5mm profile, it sits comfortably on most wrists. [seikata-wm-94b35239fdce]

Also known as: Monster, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

42mm

Case Thickness

10.5mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

80m

Dial Color

White

Jewels

28j

Frequency

28,800 bph

Power Reserve

39 hours

Year

1971

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