Seiko Cal. 6660 - 820

The Seiko 6660-820 represents an important milestone in Seiko's 1975 lineup. Powered by the 6660 caliber with 17j jewels beating at 28,800 bph, it delivers a 53 hours power reserve. [seikata-wm-5da8041c4b7c]

Also known as: Shogun, Baby Tuna

Specifications

Movement

Quartz

Case Material

Hardlex-Coated Steel

Case Width

37mm

Case Thickness

14.2mm

Lug Width

18mm

Crystal

Sapphire

Bezel

Coin-Edge

Water Resistance

110m

Dial Color

Cream

Jewels

17j

Frequency

28,800 bph

Power Reserve

53 hours

Year

1975

Related Models

• Seiko 6391-442
• Seiko 0741-639
• Seiko 6687-864
• Seiko 5212-472
• Seiko 6659-503
• Seiko 4565-801
• Seiko 0711-160
• Seiko 4572-405
• Seiko 6315-697
• Seiko 7095-371
• Seiko 0796-144
• Seiko 7132-418