Arithmometer by Elliott Brothers
1885-1894
Thomas De Colmar's Arithmometer, c 1870., with detachable lid
1880-1900
Arithmaurel calculating machine made by Maurel and Jayet
1848
Arithmometer labelled "Bunzel Delton Calculating Machine Factory Vienna"
1908-1915
Tate's patent arithmometer
1900-1925
Layton's Improved Arithmometer
1910
Thomas type arithmometer
1870-1910
Thomas de Colmar arithmometer
1876-1880
"Madas" calculating machine with metal cover
1920
Tate's patent arithmometer no. 2733
1900-1920
Madas model XXL electric calculating machine by H.W. Egli Limited
1945-1955
Layton's improved arithmometer no.1624
1900-1920
Madas model BTX calculating machine serial No. 102199
1955-1965
Madas electrically driven calculating machine no.12465
1935-1950
TIM (time is money) trade marked arithmometer c. 1910-1920
1910-1920