Seiko Cal. 6613 - 143

The Seiko 6613-143 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 42mm case give it a distinctive presence on the wrist. [seikata-wm-738439e30d24]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

42mm

Case Thickness

15.8mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

27j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1971

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