Seiko Cal. 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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