Seiko Cal. 4421 - 397

The Seiko 4421-397 represents an important milestone in Seiko's 1993 lineup. With its 20mm lug width and 11.7mm profile, it sits comfortably on most wrists. [seikata-wm-426effcfb6ec]

Also known as: Helmet, Navigator

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

39mm

Case Thickness

11.7mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

White

Jewels

34j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1993

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