Seiko Cal. 5671 - 540

The Seiko 5671-540 represents an important milestone in Seiko's 1972 lineup. With its 18mm lug width and 10.4mm profile, it sits comfortably on most wrists. [seikata-wm-f8275d37681c]

Also known as: Monster

Specifications

Movement

Automatic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Black

Jewels

36j

Frequency

36,000 bph

Power Reserve

67 hours

Year

1972

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