Seiko Cal. 6686 - 645

The Seiko 6686-645 represents an important milestone in Seiko's 1979 lineup. The Inner Rotating bezel and 40mm case give it a distinctive presence on the wrist. [seikata-wm-7b8332b21205]

Also known as: Baby Tuna

Specifications

Movement

Automatic

Case Material

Titanium

Case Width

40mm

Case Thickness

10.0mm

Lug Width

18mm

Crystal

Mineral

Bezel

Inner Rotating

Water Resistance

110m

Dial Color

Cream

Jewels

20j

Frequency

28,800 bph

Power Reserve

56 hours

Year

1979

Related Models

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• Seiko 4540-532
• Seiko 6330-789
• Seiko 3820-562
• Seiko 6217-971
• Seiko 7098-462
• Seiko 5262-366
• Seiko 3891-769
• Seiko 3827-673
• Seiko 5225-308
• Seiko 0743-136
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