This is actually a picture of the printing mechanism for another machine of his, called the Difference Engine No. 2, which he never built, but which the Science Museum did build in the '80s and '90s.
Dette er faktisk et billede af printe mekanismen for en anden af hans maskiner, kaldet the Difference Engine No. 2, som han aldrig byggede, men det gjorde the Science Museum i 80'erne og 90'erne.