Seiko Cal. 4418 - 721

The Seiko 4418-721 represents an important milestone in Seiko's 1986 lineup. Powered by the 4418 caliber with 22j jewels beating at 21,600 bph, it delivers a 47 hours power reserve. [seikata-wm-a4bc518fc07d]

Also known as: Sportsmatic

Specifications

Movement

Hand-Winding

Case Material

Titanium

Case Width

40mm

Case Thickness

11.7mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

140m

Dial Color

Blue Sunburst

Jewels

22j

Frequency

21,600 bph

Power Reserve

47 hours

Year

1986

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