Seiko Cal. 6643 - 590

The Seiko 6643-590 represents an important milestone in Seiko's 1983 lineup. Powered by the 6643 caliber with 23j jewels beating at 28,800 bph, it delivers a 42 hours power reserve. [seikata-wm-231c132a59e9]

Also known as: Golden Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

42mm

Case Thickness

8.2mm

Lug Width

22mm

Crystal

Sapphire

Bezel

Bidirectional

Water Resistance

90m

Dial Color

Navy

Jewels

23j

Frequency

28,800 bph

Power Reserve

42 hours

Year

1983

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