Marvin> In checking some other stuff, I just ran across a neat site Marvin> dealing with the ENIGMA CIPHER MACHINES among other antique Marvin> cipher machines and calculators. The main page site is W1TP Marvin> TELEGRAPH AND SCIENTIFIC INSTRUMENT MUSEUMS, and has some Marvin> pretty interesting stuff on it! Marvin> http://w1tp.com/ Neat, thanks! As happens a lot with Enigma descriptions, you see lots of references to English work and none to Polish work. This in spite of the fact that Poles did the original hard part of cracking Enigma, and the English contribution was really more in mass-producing the process and tweaking it as the Germans made incremental changes to the Enigma machines. The links to the van Verk Enigma-like machine are worth looking at, in particular her website which shows a bunch of other impressive mechanical and electronic work. paul