".. the German fracture font is not too easy to read, but the machine is Torpedo, made in Germany from 1933 onwards and the picture is taken from the ca. 1937 appendix of Martin's book (again one reason why the the appendix should be translated, too). I have a little newer Torpedo, but not yet a digital camera to take a photo of it."

Timo Leipala.

Source: Timo Leipala

X-Number World of Calculators