I think you can tell from the size & by comparison with other similar caps on the same board whether 68 is 68 microfarads. Most probably you're right if they are in silver case...as you said.
Measuring the cap shows it appears to be 68uF, so I'm guessing 35V and it appears "K" may be the tolerance code which should indicate 10% according to a web page I found. Thanks for the assistance Ill give it a try..
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