Seiko Cal. 4490 - 640

The Seiko 4490-640 represents an important milestone in Seiko's 1979 lineup. Powered by the 4490 caliber with 34j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-9638d267c3f5]

Also known as: Emperor, Arnie

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

45mm

Case Thickness

13.3mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

70m

Dial Color

White

Jewels

34j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1979

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