Seiko Cal. 4421 - 407

The 4421-407 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4421 caliber with 26j jewels beating at 21,600 bph, it delivers a 63 hours power reserve. [seikata-wm-117641aa2aff]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

10.9mm

Lug Width

22mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

140m

Dial Color

Champagne

Jewels

26j

Frequency

21,600 bph

Power Reserve

63 hours

Year

1974

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