Seiko Cal. 6620 - 138

The 6620-138 is a sought-after Quartz piece from Seiko's golden era. The Rotating bezel and 39mm case give it a distinctive presence on the wrist. [seikata-wm-01fe8bb23384]

Also known as: Sumo

Specifications

Movement

Quartz

Case Material

PVD Black

Case Width

39mm

Case Thickness

9.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

90m

Dial Color

Green

Jewels

29j

Frequency

36,000 bph

Power Reserve

44 hours

Year

1968

Related Models

• Seiko 6611-283
• Seiko 3812-394
• Seiko 4538-384
• Seiko 0721-587
• Seiko 3860-597
• Seiko 4425-476
• Seiko 7178-713
• Seiko 7172-667
• Seiko 7175-404
• Seiko 5232-731
• Seiko 6145-439
• Seiko 4463-765