Seiko Cal. 6620 - 981

The Seiko 6620-981 represents an important milestone in Seiko's 1971 lineup. Powered by the 6620 caliber with 25j jewels beating at 21,600 bph, it delivers a 45 hours power reserve. [seikata-wm-70e9e5fef3ff]

Also known as: Helmet, Sea Horse

Specifications

Movement

Spring Drive

Case Material

Gold-Plated

Case Width

38mm

Case Thickness

14.8mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Fixed

Water Resistance

110m

Dial Color

Silver

Jewels

25j

Frequency

21,600 bph

Power Reserve

45 hours

Year

1971

Related Models

• Seiko 6158-722
• Seiko 7136-691
• Seiko 4447-884
• Seiko 5687-841
• Seiko 3862-480
• Seiko 5239-929
• Seiko 7017-516
• Seiko 3817-503
• Seiko 0788-522
• Seiko 6669-339
• Seiko 3872-433
• Seiko 6236-562