Seiko Cal. 4521 - 410

The 4521-410 is a sought-after Automatic piece from Seiko's golden era. Powered by the 4521 caliber with 19j jewels beating at 28,800 bph, it delivers a 52 hours power reserve. [seikata-wm-0d619c4821dc]

Also known as: Bullhead, Sportsmatic

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

41mm

Case Thickness

10.2mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

170m

Dial Color

Black

Jewels

19j

Frequency

28,800 bph

Power Reserve

52 hours

Year

1969

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