Seiko Cal. 5639 - 528

The 5639-528 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 5639 caliber with 32j jewels beating at 21,600 bph, it delivers a 66 hours power reserve. [seikata-wm-455d38083e00]

Also known as: Monster

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

38mm

Case Thickness

10.7mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Bidirectional

Water Resistance

140m

Dial Color

Navy

Jewels

32j

Frequency

21,600 bph

Power Reserve

66 hours

Year

1973

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