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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).
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
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
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
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!
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
Back to top.
Addimult Addmaster Junior, with vinyl case, stylus, outer box and instructions
8 slides, 9 digit displays. Subtraction on reverse. 5 x 3.5 inches.
Addimult Addmaster Junior (Sterling version), with wallet case, stylus/propelling pencil, notebook, retail box, guarantee dated 21/7/1959 & instructions. 8 slides, 9 digit displays, subtraction on reverse, 5” x 3.5”
Forward 6 Reliable Pocket Adding Machine Art. No. 67-8432 with vinyl wallet, stylus and card outer case.
 6 slides, 6 digit displays, subtraction on reverse, 5” x 2.4”. This appears to be another incarnation of the Addimult Addifix 6 without the stylus clip formed on the case edge. The calculator appears unused although the outer card case has been bumped and damaged by removal of a sticky label. Obtained from the USA.
Addimult Addmaster Baby
 6 slides, 6 digit displays
 Subtraction on reverse
 5 x 2.5 inches
 With stylus & vinyl case
 1960s
 Complete with instructions
 Sterling currency version