Seiko Cal. 4528 - 390

The 4528-390 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4528 caliber with 30j jewels beating at 36,000 bph, it delivers a 71 hours power reserve. [seikata-wm-e4abf951b311]

Also known as: Goldfeather

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.4mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

30j

Frequency

36,000 bph

Power Reserve

71 hours

Year

1987

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