Seiko Cal. 6688 - 975

Seiko 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

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seikata-wm-92716fe06031