Seiko Cal. 0721 - 425

Seiko 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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