Seiko Cal. 4421 - 373

The Seiko 4421-373 represents an important milestone in Seiko's 1976 lineup. Powered by the 4421 caliber with 36j jewels beating at 28,800 bph, it delivers a 59 hours power reserve. [seikata-wm-bf181f1692e1]

Also known as: UFO

Specifications

Movement

Automatic

Case Material

Two-Tone

Case Width

34mm

Case Thickness

9.4mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Black

Jewels

36j

Frequency

28,800 bph

Power Reserve

59 hours

Year

1976

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