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The firm was founded by Hans-Wolfgang Kubler who was the son of Carl Kubler (Addiator). He worked for Addiator in the 1930s and opened a new factory in Switzerland in the 1940s. Ca 1946 production started in Liechtenstein, initially as Addiator, then Addimult, later moving back to Germany (Donaueschingen).
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Addimult Addmaster (Sterling model) serial number 802422
 In steel desk case with stylus
 9 slides, 9 digit displays
Subtraction on reverse (accessed by hinging case forward)
 7 x 4.3 inches
 1950s
 Basically an Addiator produced by Addimult
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Addimult Sumax S serial no. 991694, with leather case, stylus, outer box and instructions (German)
 8 slides, 9 digit displays. Subtraction on reverse. 5 x 3.5 inches. New, unused, 1970s.
 Obtained from Germany
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Addimult Addifix 6 Serial no. 564636
 6 slides, 6 digit displays
 Subtraction on reverse
 5 x 2.5 inches
 With stylus
 1960s
 Obtained from Germany
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Addimult Addmaster Baby
 6 slides, 6 digit displays
 Subtraction on reverse
 5 x 2.5 inches
 With stylus & vinyl case
 1960s
 Complete with instructions
 Same as the Addifix 6 except for the name!
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Addimult Addmaster (Sterling model) serial number 437756
 In steel desk case with stylus
 9 slides, 9 digit displays
Subtraction on reverse (accessed by hinging case forward)
 7 x 4.3 inches
 1960s
 A later version of the one above
 The stylus has a propelling pencil on the other end