Seiko Cal. 4421 - 250

The 4421-250 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4421 caliber with 36j jewels beating at 28,800 bph, it delivers a 48 hours power reserve. [seikata-wm-2f769bfea6ec]

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

15.7mm

Lug Width

18mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Champagne

Jewels

36j

Frequency

28,800 bph

Power Reserve

48 hours

Year

1973

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