Seiko Cal. 4528 - 472

The 4528-472 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4528 caliber with 21j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-24037a7cf377]

Also known as: Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

44mm

Case Thickness

15.3mm

Lug Width

19mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

30m

Dial Color

Champagne

Jewels

21j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1965

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