Seiko Cal. 4490 - 644

The Seiko 4490-644 represents an important milestone in Seiko's 1991 lineup. Powered by the 4490 caliber with 21j jewels beating at 36,000 bph, it delivers a 54 hours power reserve. [seikata-wm-8079837af056]

Also known as: Baby Tuna, Arnie

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

43mm

Case Thickness

15.6mm

Lug Width

22mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

100m

Dial Color

Cream

Jewels

21j

Frequency

36,000 bph

Power Reserve

54 hours

Year

1991

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