Seiko Cal. 6620 - 234

This Spring Drive model from 1981 features a 38mm Hardlex-Coated Steel case. Powered by the 6620 caliber with 36j jewels beating at 28,800 bph, it delivers a 38 hours power reserve. [seikata-wm-5443062ef36b]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

38mm

Case Thickness

8.4mm

Lug Width

21mm

Crystal

Sapphire

Bezel

Inner Rotating

Water Resistance

60m

Dial Color

Champagne

Jewels

36j

Frequency

28,800 bph

Power Reserve

38 hours

Year

1981

Related Models

• Seiko 3826-535
• Seiko 5675-281
• Seiko 0710-954
• Seiko 7020-790
• Seiko 4538-488
• Seiko 4424-215
• Seiko 4453-440
• Seiko 3854-506
• Seiko 3818-237
• Seiko 6619-203
• Seiko 6645-175
• Seiko 7149-513