Seiko Cal. 4521 - 720

The 4521-720 is a sought-after Hand-Winding piece from Seiko's golden era. Powered by the 4521 caliber with 29j jewels beating at 36,000 bph, it delivers a 38 hours power reserve. [seikata-wm-b097bcb42fc3]

Specifications

Movement

Hand-Winding

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

11.8mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

180m

Dial Color

White

Jewels

29j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1987

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