Seiko Cal. 5660 - 727

The Seiko 5660-727 represents an important milestone in Seiko's 1971 lineup. With its 19mm lug width and 15.8mm profile, it sits comfortably on most wrists. [seikata-wm-5c1fabc953c8]

Also known as: Sumo

Specifications

Movement

Solar

Case Material

Titanium

Case Width

40mm

Case Thickness

15.8mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

40m

Dial Color

Black

Jewels

24j

Frequency

36,000 bph

Power Reserve

49 hours

Year

1971

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