Seiko Cal. 6639 - 313

The 6639-313 is a sought-after Solar piece from Seiko's golden era. With its 18mm lug width and 8.6mm profile, it sits comfortably on most wrists. [seikata-wm-6061aeb14978]

Also known as: Sumo, Baby Tuna

Specifications

Movement

Solar

Case Material

Two-Tone

Case Width

34mm

Case Thickness

8.6mm

Lug Width

18mm

Crystal

Acrylic

Bezel

Rotating

Water Resistance

60m

Dial Color

Black

Jewels

25j

Frequency

36,000 bph

Power Reserve

38 hours

Year

1977

Related Models

• Seiko 5299-767
• Seiko 6120-268
• Seiko 5645-959
• Seiko 6146-146
• Seiko 0717-361
• Seiko 5668-537
• Seiko 6275-337
• Seiko 6344-230
• Seiko 4545-573
• Seiko 6616-982
• Seiko 0752-819
• Seiko 5283-923