Seiko Cal. 5640 - 366

The Seiko 5640-366 represents an important milestone in Seiko's 1996 lineup. The Inner Rotating bezel and 37mm case give it a distinctive presence on the wrist. [seikata-wm-1e716136d249]

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

37mm

Case Thickness

12.1mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

21j

Frequency

28,800 bph

Power Reserve

36 hours

Year

1996

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