Seiko Cal. 5621 - 437

The 5621-437 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5621 caliber with 18j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-00f9ebd899e4]

Also known as: Rally

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.6mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

100m

Dial Color

Champagne

Jewels

18j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1997

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