Seiko Cal. 6648 - 991

The Seiko 6648-991 represents an important milestone in Seiko's 1988 lineup. It features a Black dial protected by a Sapphire crystal and offers 90m of water resistance. [seikata-wm-0eb614fa5129]

Also known as: Tuna, Silverwave

Specifications

Movement

Kinetic

Case Material

Gold-Plated

Case Width

44mm

Case Thickness

13.7mm

Lug Width

20mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Black

Jewels

33j

Frequency

36,000 bph

Power Reserve

47 hours

Year

1988

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