Hello, I have just published the results of an international investigation referring to the dating of the world-famous mechanical calculating machine "Millionaire". If you know other Millionaire machines please let me know. Many thanks. Best, Herbert German version in Research Collection https://www.research-collection.ethz.ch/handle/20.500.11850/295764 English version in Research Collection: https://www.research-collection.ethz.ch/handle/20.500.11850/296752 Communications of the ACM: Mystery Dating of the World-famous 'Millionaire' Calculating Machine Solved https://cacm.acm.org/blogs/blog-cacm/231865-mystery-dating-of-the-world-famo... Best, Herbert -- Bruderer Informatik Seehaldenstraße 26 Postfach 47 CH-9401 Rorschach Schweiz/Switzerland Telefon +41 71 855 77 11