Seiko Cal. 6690 - 643

The Seiko 6690-643 represents an important milestone in Seiko's 1999 lineup. It features a Black dial protected by a Sapphire crystal and offers 160m of water resistance. [seikata-wm-ebadfb72b352]

Also known as: Golden Tuna, Baby Tuna

Specifications

Movement

Solar

Case Material

Stainless Steel

Case Width

41mm

Case Thickness

8.9mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

160m

Dial Color

Black

Jewels

23j

Frequency

21,600 bph

Power Reserve

68 hours

Year

1999

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