Seiko Cal. 6643 - 169

Released in 1977, the Cal. 6643 with design code 169 was part of Seiko's domestic market collection. It features a Burgundy dial protected by a Acrylic crystal and offers 50m of water resistance. [seikata-wm-97fc71396ccb]

Also known as: Tuna

Specifications

Movement

Hand-Winding

Case Material

Gold-Plated

Case Width

43mm

Case Thickness

14.7mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Coin-Edge

Water Resistance

50m

Dial Color

Burgundy

Jewels

17j

Frequency

36,000 bph

Power Reserve

70 hours

Year

1977

Related Models

• Seiko 4535-531
• Seiko 6681-499
• Seiko 7144-788
• Seiko 5252-330
• Seiko 4438-346
• Seiko 5640-903
• Seiko 0722-206
• Seiko 0777-511
• Seiko 7118-667
• Seiko 7031-703
• Seiko 6211-348
• Seiko 6622-687