Seiko Cal. 0721 - 522

The 0721-522 is a sought-after Automatic piece from Seiko's golden era. Powered by the 0721 caliber with 29j jewels beating at 21,600 bph, it delivers a 37 hours power reserve. [seikata-wm-1cc50ebe1eef]

Also known as: World Timer, Sea Horse

Specifications

Movement

Automatic

Case Material

PVD Black

Case Width

37mm

Case Thickness

9.3mm

Lug Width

20mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Black

Jewels

29j

Frequency

21,600 bph

Power Reserve

37 hours

Year

1987

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