Seiko Cal. 6643 - 675

The Seiko 6643-675 represents an important milestone in Seiko's 1980 lineup. It features a White dial protected by a Acrylic crystal and offers 160m of water resistance. [seikata-wm-98f20a7cdc0f]

Also known as: Sportsmatic, Baby Tuna

Specifications

Movement

Spring Drive

Case Material

PVD Black

Case Width

36mm

Case Thickness

12.9mm

Lug Width

19mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

160m

Dial Color

White

Jewels

25j

Frequency

28,800 bph

Power Reserve

66 hours

Year

1980

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