Seiko Cal. 6620 - 655

The 6620-655 is a sought-after Quartz piece from Seiko's golden era. Powered by the 6620 caliber with 34j jewels beating at 28,800 bph, it delivers a 49 hours power reserve. [seikata-wm-6d21245f1a90]

Also known as: Monster, Bullhead

Specifications

Movement

Quartz

Case Material

Gold-Plated

Case Width

39mm

Case Thickness

15.8mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Fixed

Water Resistance

90m

Dial Color

Cream

Jewels

34j

Frequency

28,800 bph

Power Reserve

49 hours

Year

1966

Related Models

• Seiko 6388-325
• Seiko 0755-527
• Seiko 3825-944
• Seiko 4447-190
• Seiko 6312-457
• Seiko 5621-285
• Seiko 3839-228
• Seiko 7122-171
• Seiko 5249-399
• Seiko 6395-271
• Seiko 7061-528
• Seiko 7124-532