Seiko Cal. 0721 - 309

The Seiko 0721-309 represents an important milestone in Seiko's 1986 lineup. Powered by the 0721 caliber with 24j jewels beating at 36,000 bph, it delivers a 36 hours power reserve. [seikata-wm-3bef83946f0d]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

44mm

Case Thickness

10.9mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Rotating

Water Resistance

150m

Dial Color

Cream

Jewels

24j

Frequency

36,000 bph

Power Reserve

36 hours

Year

1986

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