Seiko Cal. 6646 - 689

The Seiko 6646-689 represents an important milestone in Seiko's 1980 lineup. The Coin-Edge bezel and 36mm case give it a distinctive presence on the wrist. [seikata-wm-0bc60defec63]

Also known as: Tuna, World Timer

Specifications

Movement

Automatic

Case Material

Gold-Plated

Case Width

36mm

Case Thickness

8.3mm

Lug Width

19mm

Crystal

Mineral

Bezel

Coin-Edge

Water Resistance

60m

Dial Color

Champagne

Jewels

21j

Frequency

28,800 bph

Power Reserve

44 hours

Year

1980

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