Seiko Cal. 5660 - 836

The Seiko 5660-836 represents an important milestone in Seiko's 1991 lineup. The Inner Rotating bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-3b447c975a22]

Also known as: Helmet

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

36mm

Case Thickness

10.8mm

Lug Width

19mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

Burgundy

Jewels

19j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1991

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