Seiko Cal. 6610 - 731

The Seiko 6610-731 represents an important milestone in Seiko's 1971 lineup. The Rotating bezel and 43mm case give it a distinctive presence on the wrist. [seikata-wm-16b4564357e9]

Also known as: Arnie

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

43mm

Case Thickness

9.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

200m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1971

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