Over the years, Jerry Proc created a wonderful on-line crypto collection. His site, called Crypto Machines, contains a large number of images and background information on numerous cipher machines. It's a very complete collection, giving us a good view on the development of these machines, during the last century. From the Confederate Cipher Disk, Russia's Fialka, the Hagelin models, over WW2 machines such as the German Enigma and Sturgeon, or the American SIGABA, KL7 to the more recent electronic devices like STU III, SINCGARS or KG-235 Sectera Network encryptor. The KG, KY, BID and KW series. You name it, it's on his site. Although Jerry claims not to be a crypto expert, his passion makes this site a reference to cryptographic devices from all over the world.