Seiko Cal. 5621 - 423

The 5621-423 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 5621 caliber with 20j jewels beating at 28,800 bph, it delivers a 43 hours power reserve. [seikata-wm-df06f367db6d]

Also known as: Tuna

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

41mm

Case Thickness

15.3mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

80m

Dial Color

Navy

Jewels

20j

Frequency

28,800 bph

Power Reserve

43 hours

Year

1970

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