Seiko Cal. 6617 - 638

The Seiko 6617-638 represents an important milestone in Seiko's 1996 lineup. Powered by the 6617 caliber with 21j jewels beating at 36,000 bph, it delivers a 58 hours power reserve. [seikata-wm-9464bc4a8ba0]

Also known as: World Timer, Flighty

Specifications

Movement

Solar

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

8.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

180m

Dial Color

White

Jewels

21j

Frequency

36,000 bph

Power Reserve

58 hours

Year

1996

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