Seiko Cal. 6639 - 845

The Seiko 6639-845 represents an important milestone in Seiko's 1992 lineup. Powered by the 6639 caliber with 20j jewels beating at 36,000 bph, it delivers a 50 hours power reserve. [seikata-wm-59fd4f2279b8]

Also known as: Helmet, World Timer

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

41mm

Case Thickness

15.8mm

Lug Width

21mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

40m

Dial Color

Champagne

Jewels

20j

Frequency

36,000 bph

Power Reserve

50 hours

Year

1992

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