Seiko Cal. 4490 - 740

The Seiko 4490-740 represents an important milestone in Seiko's 1970 lineup. Powered by the 4490 caliber with 27j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-67058f281d76]

Also known as: World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

200m

Dial Color

Burgundy

Jewels

27j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1970

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