fathom - 5:00 pm on Jun 2, 2013 (gmt 0)
The links are not on my site, the are on others site, and most are abandoned sites, I remember many years ago I had a penalty in yahoo due of them, and I wrote them all (I saw) and most didnt do anything about them, finaly yahoo lifted the penalty and think they started to ignore them.
The links are from year 2002.
I cant edit or add any nofollow on them, these pages should be updated and changed however the linkfarm disappeared many years ago but there are still pages out ther.
The same rules still apply. You're saying such links provided unwanted ranks.
If they didn't provide unwanted ranks you wouldn't need to worry about them and because PENGUIN already handled the unwanted ranks - there is nothing more that needs to be done in this regard.
Your challenge is finding new ways to get wanted links that Google does not object to thus you will produce wanted ranks.
That isn't an easy task but nothing easy is worth very much.
How can I know the links were devaluated by penguin and not my site being devaluated?
You generally don't. All we can to is theorize what links Google does not like.
I generally use the worse offenders rule... all sitewide links are exploiting the most (whether they are or are not), links on pages with high PR is next... links on scrapped pages on worthless domains are the least of your worry because they cannot manipulate much without 100s of thousands of them.
The only thing I know is that I downloaded backlinks and saw some of them being discovered between 2006 and 2011.
Discovery dates are useful to a degree... any link discovered after a PENGUIN problem isn't likely a link you need to worry about provided you didn't have any stumble later on.
At least many years ago google ignored those linkfarms backlinks on several domains, they said, if you dont have the pages on your site, not to worry about the backlinks. However many years passed.
This is completely immaterial. If these have caused you a recent issue had Google took action against them in the past you would have lost results back then as well... the fact that you may have gotten unfair value for many years is a major positive value for you at the expense of your competitors.
Think how your competitors feel getting screwed over by Google ignoring your unfair advantage for so long.
That said, you don't need to concern yourself with them - your challenge today is figuring out better ways to acquire "earned links".