Seiko Cal. 6620 - 339

The Seiko 6620-339 represents an important milestone in Seiko's 1980 lineup. Powered by the 6620 caliber with 20j jewels beating at 28,800 bph, it delivers a 60 hours power reserve. [seikata-wm-dd25a28d9c9f]

Also known as: Crown, Baby Tuna

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

40mm

Case Thickness

11.4mm

Lug Width

21mm

Crystal

Acrylic

Bezel

Bidirectional

Water Resistance

30m

Dial Color

Green

Jewels

20j

Frequency

28,800 bph

Power Reserve

60 hours

Year

1980

Related Models

• Seiko 4526-167
• Seiko 0747-786
• Seiko 6179-392
• Seiko 7122-293
• Seiko 7044-894
• Seiko 6282-665
• Seiko 0743-528
• Seiko 5259-948
• Seiko 5238-528
• Seiko 6261-350
• Seiko 6664-852
• Seiko 6296-818