Seiko Cal. 6610 - 731

The Seiko 6610-731 represents an important milestone in Seiko's 1968 lineup. With its 22mm lug width and 10.0mm profile, it sits comfortably on most wrists. [seikata-wm-2859fba2ca56]

Also known as: Navigator

Specifications

Movement

Hand-Winding

Case Material

PVD Black

Case Width

37mm

Case Thickness

10.0mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

Burgundy

Jewels

27j

Frequency

21,600 bph

Power Reserve

62 hours

Year

1968

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