Like the DeLorean from Back to the Future (1985), Wells' time machine becomes covered with ice when it travels through time.
The museum that the time machine was exhibited in was the same museum used in Ghostbusters II (1989).
The pictures of older H.G. Wells that a young H.G. Wells sees at the exhibit are actual pictures of the real H.G. Wells but with the mark of the side of his face that Freddie Stroma has.