Seiko Cal. 0721 - 425

The 0721-425 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 0721 caliber with 30j jewels beating at 21,600 bph, it delivers a 44 hours power reserve. [seikata-wm-7be19afad4db]

Also known as: Tuna, Helmet

Specifications

Movement

Kinetic

Case Material

Hardlex-Coated Steel

Case Width

44mm

Case Thickness

12.6mm

Lug Width

18mm

Crystal

Mineral

Bezel

Fixed

Water Resistance

180m

Dial Color

Navy

Jewels

30j

Frequency

21,600 bph

Power Reserve

44 hours

Year

1990

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