Seiko Cal. 4528 - 397

The 4528-397 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4528 caliber with 31j jewels beating at 36,000 bph, it delivers a 66 hours power reserve. [seikata-wm-73848038260c]

Also known as: Golden Tuna, Flighty

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Burgundy

Jewels

31j

Frequency

36,000 bph

Power Reserve

66 hours

Year

1980

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