Seiko Cal. 4420 - 424

The Seiko 4420-424 represents an important milestone in Seiko's 1998 lineup. Powered by the 4420 caliber with 25j jewels beating at 21,600 bph, it delivers a 40 hours power reserve. [seikata-wm-ba1721c780c0]

Also known as: Helmet, Golden Tuna

Specifications

Movement

Hand-Winding

Case Material

Stainless Steel

Case Width

37mm

Case Thickness

15.0mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

90m

Dial Color

Black

Jewels

25j

Frequency

21,600 bph

Power Reserve

40 hours

Year

1998

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