Seiko Cal. 4421 - 337

The Seiko 4421-337 represents an important milestone in Seiko's 1969 lineup. Powered by the 4421 caliber with 28j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-5e87765f1b91]

Also known as: Sportsmatic, Golden Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

36mm

Case Thickness

12.0mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

70m

Dial Color

Cream

Jewels

28j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1969

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