Seiko Cal. 0721 - 524

The Seiko 0721-524 represents an important milestone in Seiko's 1986 lineup. Powered by the 0721 caliber with 30j jewels beating at 21,600 bph, it delivers a 53 hours power reserve. [seikata-wm-38566cb7a221]

Also known as: Sumo

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

38mm

Case Thickness

15.5mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

160m

Dial Color

Champagne

Jewels

30j

Frequency

21,600 bph

Power Reserve

53 hours

Year

1986

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