Seiko Cal. 4521 - 725

Seiko 4521-725

The 4521-725 is a sought-after Kinetic piece from Seiko's golden era. Powered by the 4521 caliber with 35j jewels beating at 28,800 bph, it delivers a 66 hours power reserve. [seikata-wm-7c1a7424aa77]

Also known as: Tuna

Specifications

Movement
Kinetic
Case Material
Two-Tone
Case Width
41mm
Case Thickness
10.3mm
Lug Width
22mm
Crystal
Sapphire
Bezel
Inner Rotating
Water Resistance
60m
Dial Color
White
Jewels
35j
Frequency
28,800 bph
Power Reserve
66 hours
Year
1971

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seikata-wm-7c1a7424aa77