[HereInTheHeartland]

“document printed in 2008 with 1961 ink on 1961 paper would be discernable from a document printed in 1961 with 1961 ink on 1961 paper. “

I assumed something like that would be true.
The problem is; if they make a quality forgery it might work.
The chances of physically examining the created document are probably minimal.
The document (when produced) needs to be tested to see if it was just created.

[DustyMoment]

The problem is; if they make a quality forgery it might work.

Yes and no. If they get the same people who forged Bammy's COLB, it will be caught in a heartbeat. To pull it off, they will have to hire experts capable of taking a document that is (likely) printed on paper that was manufactured within the past couple of years that has ink from '60/'61 timeframe. The aging of the paper and of the ink would be completely different and the acids on a 1961 document would act differently than a 1960/'61 ink on a 1960/'61 paper.

Just having the printer is not enough. They will have to engage in extensive chemical aging on the paper and the ink to produce a "quality" forgery. I'm not saying it can't be done, but it is going to be VERY difficult!