Seiko Cal. 6646 - 555

The Seiko 6646-555 represents an important milestone in Seiko's 1988 lineup. The Coin-Edge bezel and 44mm case give it a distinctive presence on the wrist. [seikata-wm-a158a5ae2d6d]

Also known as: Bullhead, World Timer

Specifications

Movement

Kinetic

Case Material

Two-Tone

Case Width

44mm

Case Thickness

11.0mm

Lug Width

20mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Navy

Jewels

20j

Frequency

21,600 bph

Power Reserve

48 hours

Year

1988

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