Seiko Cal. 0721 - 764

The Seiko 0721-764 represents an important milestone in Seiko's 1989 lineup. It features a Silver dial protected by a Sapphire crystal and offers 80m of water resistance. [seikata-wm-fae7bb99fdf1]

Also known as: Sumo, Sportsmatic

Specifications

Movement

Quartz

Case Material

Titanium

Case Width

39mm

Case Thickness

8.8mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

Silver

Jewels

18j

Frequency

36,000 bph

Power Reserve

59 hours

Year

1989

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