Arithmometer by Elliott Brothers

1885-1894

Layton's improved arithmometer no.1624

1900-1920

Tate's patent arithmometer no. 2733

1900-1920

Thomas de Colmar arithmometer

1876-1880

Madas model XXL electric calculating machine by H.W. Egli Limited

1945-1955

"Madas" calculating machine with metal cover

1920

Tate's patent arithmometer

1900-1925

Arithmaurel calculating machine made by Maurel and Jayet

1848

Layton's Improved Arithmometer

1910

Arithmometer labelled "Bunzel Delton Calculating Machine Factory Vienna"

1908-1915

Thomas type arithmometer

1870-1910

Thomas De Colmar's Arithmometer, c 1870., with detachable lid

1880-1900

Madas electrically driven calculating machine no.12465

1935-1950

TIM (time is money) trade marked arithmometer c. 1910-1920

1910-1920

Madas model BTX calculating machine serial No. 102199

1955-1965