Seiko Cal. 5638 - 741

The Seiko 5638-741 represents an important milestone in Seiko's 1966 lineup. Powered by the 5638 caliber with 19j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-8aebdac9ede1]

Also known as: Navigator

Specifications

Movement

Quartz

Case Material

Two-Tone

Case Width

39mm

Case Thickness

14.7mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Black

Jewels

19j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1966

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