This website is not a reference on this particular machine. Detailed information can be found on the John Wolff’s page, at the address below.
A more detailed information about the history of The Millionaire is described in my book “SWISS CALCULATING MACHINES”
The “Millionaire” was designed by the Swiss engineer Otto Steiger (born in Flawil on September 15, 1858; died in Wil on April 4, 1923)
Some typical models