Hat tip to Christina Engelbart at Collective IQ
I was wondering when this was going to happen. The Difference Engine exhibit is coming to an end. I saw it in January 2009, since I was attending the Rebooting Computing Summit at the Computer History Museum, in Mountain View, CA. The people running the exhibit said that it was commissioned by Nathan Myhrvold, he had temporarily loaned it to the CHM, and he was soon going to reclaim it, putting it in his house. They thought it might happen in April of that year. A couple years ago, I checked with Tom R. Halfhill, who has worked as a volunteer at the museum, and he told me it was still there.
The last day for the exhibit is January 31, 2016. So if you have the opportunity to see it, take it now. I highly recommend it.
There is another replica of this same difference engine on permanent display at the London Science Museum in England. After this, that will be the only place where you can see it.
Here is a video they play at the museum explaining its significance. The exhibit is a working replica of Babbage’s Difference Engine #2, a redesign he did of his original idea.