Trying to convince a JW that the Wt predicted 1925 is hard because they won't look at anything from 'apostate' sites. But the American Archive Organisation is a disinterested organisation who publishes anything ever printed in America online for research and scholarship purposes. They are not apostates because they publish all religious, political, judicial, legislative etc online for the public to research.
Maybe this will help you convince some JWs you know. There's also "Consolation" magazine which is highly political. It came as a shock to me just how political it was, as well as racist and bigoted.
Golden Age: you will find 1925 prediction on the right hand side of page 24 of the e-document.
http://archive.org/stream/1922TheGoldenAgeMagazine/1922_Golden_Age#page/n1/mode/2up
Alternatively, you can get the PDF here, and will find the infamous prediction on page 25 of the PDF.
http://archive.org/details/1922TheGoldenAgeMagazine
Consolation: http://archive.org/details/1939ConsolationVariousIssues
I haven't read through all the stuff because there's just loads of it.
Hope this helps!