Seiko Cal. 4521 - 710

The 4521-710 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 4521 caliber with 24j jewels beating at 36,000 bph, it delivers a 45 hours power reserve. [seikata-wm-e6aec089ba72]

Also known as: Pogue

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

37mm

Case Thickness

13.4mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

60m

Dial Color

Green

Jewels

24j

Frequency

36,000 bph

Power Reserve

45 hours

Year

1975

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