Seiko Cal. 6664 - 826

The 6664-826 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6664 caliber with 21j jewels beating at 36,000 bph, it delivers a 72 hours power reserve. [seikata-wm-8a077b720cb7]

Also known as: Helmet

Specifications

Movement

Spring Drive

Case Material

Two-Tone

Case Width

45mm

Case Thickness

13.2mm

Lug Width

19mm

Crystal

Mineral

Bezel

Rotating

Water Resistance

50m

Dial Color

Champagne

Jewels

21j

Frequency

36,000 bph

Power Reserve

72 hours

Year

1978

Related Models

• Seiko 5610-240
• Seiko 6336-286
• Seiko 7064-994
• Seiko 7185-931
• Seiko 5639-367
• Seiko 0791-608
• Seiko 7132-488
• Seiko 4429-232
• Seiko 6224-649
• Seiko 5231-294
• Seiko 4592-602
• Seiko 5696-292