Seiko Cal. 6660 - 726

The Seiko 6660-726 represents an important milestone in Seiko's 1970 lineup. Powered by the 6660 caliber with 24j jewels beating at 21,600 bph, it delivers a 58 hours power reserve. [seikata-wm-a55e35e108ce]

Also known as: Helmet, UFO

Specifications

Movement

Quartz

Case Material

Stainless Steel

Case Width

40mm

Case Thickness

8.2mm

Lug Width

19mm

Crystal

Hardlex

Bezel

Coin-Edge

Water Resistance

80m

Dial Color

White

Jewels

24j

Frequency

21,600 bph

Power Reserve

58 hours

Year

1970

Related Models

• Seiko 4526-894
• Seiko 6218-942
• Seiko 4420-117
• Seiko 3849-761
• Seiko 6635-425
• Seiko 0735-259
• Seiko 5211-880
• Seiko 5672-978
• Seiko 5256-784
• Seiko 6237-731
• Seiko 4476-930
• Seiko 6325-889