Seiko Cal. 6688 - 975

The 6688-975 is a sought-after Spring Drive piece from Seiko's golden era. Powered by the 6688 caliber with 31j jewels beating at 28,800 bph, it delivers a 64 hours power reserve. [seikata-wm-92716fe06031]

Also known as: Monster, Sportsmatic

Specifications

Movement

Spring Drive

Case Material

Titanium

Case Width

35mm

Case Thickness

15.0mm

Lug Width

21mm

Crystal

Hardlex

Bezel

Rotating

Water Resistance

190m

Dial Color

Green

Jewels

31j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1990

Related Models

• Seiko 3837-293
• Seiko 5232-188
• Seiko 6216-282
• Seiko 4497-425
• Seiko 0795-587
• Seiko 6611-917
• Seiko 4575-643
• Seiko 6342-752
• Seiko 6122-356
• Seiko 7153-416
• Seiko 6152-967
• Seiko 5299-201