Seiko Cal. 4521 - 654

The 4521-654 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4521 caliber with 34j jewels beating at 36,000 bph, it delivers a 70 hours power reserve. [seikata-wm-fcac8f24ad2d]

Also known as: Crown

Specifications

Movement

Automatic

Case Material

Stainless Steel

Case Width

42mm

Case Thickness

10.2mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

30m

Dial Color

Green

Jewels

34j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1977

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