Seiko Cal. 6688 - 174

Released in 1995, the Cal. 6688 with design code 174 was part of Seiko's domestic market collection. Powered by the 6688 caliber with 21j jewels beating at 36,000 bph, it delivers a 68 hours power reserve. [seikata-wm-b784bfdeddf0]

Also known as: Tuna, Bellmatic

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

35mm

Case Thickness

14.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Inner Rotating

Water Resistance

120m

Dial Color

Green

Jewels

21j

Frequency

36,000 bph

Power Reserve

68 hours

Year

1995

Related Models

• Seiko 6698-729
• Seiko 0758-889
• Seiko 5635-951
• Seiko 4554-264
• Seiko 6337-424
• Seiko 6354-320
• Seiko 6138-575
• Seiko 5685-308
• Seiko 4429-397
• Seiko 6673-382
• Seiko 6248-547
• Seiko 7199-110