"This machine has an area of only 18 x 28 cm and weighs 5.5 kg, hence the name Portable. it is a visible printing, full-keyboard adding machine with self-correcting keys. 

Designer: Glenn J. Barrett, who was also the designer of the machine by that name. Manufacturer: Corona Typewriter Company, Groton. Distributed by: Portable Adding Machine Sales Company, 208 S. La Salle St., Chicago."

"The Corona is the former Portable and has the following function keys: repeat and clearance, sum, intermediate sum, non-adding, non-printing. The 7-digit machine is now called model A, the 1928 launched 9-digit machine model B, the same machine without direct subtraction model E."

"This is a pinwheel machine, similar to the one described in the introduction, which at the moment appears in four models:

Model A: has tens-carry in the revolution counter.

Model B: does not.

Model A2: has tens-carry in the revolution counter and has an automatic adding device attached (this means that during the time when addition is taking place in the result mechanism, the setting levers are automatically returned to their zero position without any action on the part of the operator).

Model D: does not have tens-carry in the revolution counter. although it does have twenty places in the setting mechanism.

One special advantage of this machine is that the zero positioning of the setting levers is not controlled by wing nuts but by pressing a button on the right side of the machine."

"Manufacturer: Monos A. G. Braunschweig, Cammann Strasse 7."

"There are two keyboard calculating machines in existence with this name; they are manufactured and sold by the firm Deutsche Rechenmaschinenwerke A. G. in Leipzig.

Kuhrt A: Ten decimal places in the setting mechanism, ten decimal places in the revolution counter and thirteen decimal places in the result mechanism,

Model AB: is the same as described above but possesses two counter mechanisms for results and has an arrangement by means of which computed results may automatically be transferred from the result counter mechanism into the keyboard, so that one may carry out a second, third, or further multiplication without new settings in the keyboard.

Kuhrt US is a printing, keyboard calculating machine with manual or motor drive, eighteen decimal places in both the setting and result mechanisms, and 12 decimal places in the revolution counter. It operates with multiplication bodies similar to the machine from Bollée, Steiger and Moon Hopkins."

The company was taken over by Brunsviga in 1928, production was stopped.

Kuhrt A

the machine is available with various capacity and with an electric motor

the machine is available with various capacity and with an electric motor

"Manufacturer: S. W. Allen Company, 20 South Eighteenth St., Philadelphia. The machine is said to have been manufactured since 1918. Reports of sales in larger numbers date from 1923. It is a pinwheel machine produced with either 8 x 9 x 13 places or 9 X 10 X 18 places. It weighs 4.5 kg."

"The Gauss calculating machine factory was founded in Braunschweig in 1923 by E. Hengstmann, H. Scharff, and R. Ulbrich. It is a pinwheel machine with fourteen places in the result mechanism, ten in the setup mechanism, and nine in the revolution counter. Zero position of the setting levers is brought about by pressing the zero position key on the right side of the machine. The carriage is also shifted by means of keys. Only a few dozen machines were ever produced when, in October 1924, the production rights were transferred over to Hengstmann and Company. a factory for calculating machines situated at Mauernstrasse 41,  Braunschweig. The machine is now called Cosmos. There is said to be a model under construction that has tens-carry in the revolution counter."

"Manufacturer: Mira-Rechenmaschinen-Fabrik, Reichenberg, Bohmen. "

Otto Kramer, Reichenberg, Czechoslowakia

Martin Reese in his book "Neue Blicke auf alte Maschinen" gives details about the Mira (page 75 ff.) and points out that the design of the Mira is based on the Rema machine.

Mira model 1

similar models:     MZ   = with tens carry in counter reg

                               MR   = Visier with back transfer

                               MRZ = with tens carry and back transfer

other capacities: 10 x 10 x 16, 10 x 12 x 20

"The Tasma is the smallest visible printing, full-keyboard adding machine. It measures only 28 x 14 x 20 cm, has ten places in the setup mechanism, and eleven places in the result mechanism.

Manufacturer: Thaleswerk G.m.b.H., Rastatt (see the Thales)"

see Thales

since 1930, manufacturing was done at Walther, Zella-Mehlis; distribution and sales through Tasma-Gesellschaft, Berlin.

This stylus type adder has the ability to add hundreds, feet, inches and fractions. Patented 1924.

Model A: Fulton Manufacturing Company, Atlanta, GA

Model C: Precision Adding Machine Company, Providence, RI

Small adding machine, manufactured by the Kel-Sun Mfg. Co., Dayton, Ohio. Inventor: John Pfeiffer, US patent 1663726.

At the beginning, the name was just "Adding Machine", later "Little Giant Adding Machine".