Seiko Cal. 4421 - 671

The 4421-671 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4421 caliber with 20j jewels beating at 21,600 bph, it delivers a 57 hours power reserve. [seikata-wm-2281415c7f5b]

Also known as: Shogun, World Timer

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

10.4mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

130m

Dial Color

Green

Jewels

20j

Frequency

21,600 bph

Power Reserve

57 hours

Year

1969

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