Computer History Museum

The case is metal, not plastic (for Curta S/N 555503, Acces. No. 102618878, and for Curta S/N 513508, Acces. No. B325.84).. The name of the Liechtenstein commune, Mauren, is printed on the bottom plate of the calculator. This calculator has a flat-topped crank with a trapezoidal cross section. This calculator has a protrusion on the underside of the crank, under the crank handle. The crank of this calculator is secured to the main shaft with a screw or pin that is oriented perpendicular to the crank. This calculator has 6 "silver" studs protruding from the beveled surface between the crank and the readout numbers. This calculator has 3 "silver" studs protruding from the bevel between the input sliders and the lower knurled ring on the main body.

Type
Physical Object
Catalogue number
102618878
Curta mechanical calculator

Type
Physical Object
Catalogue number
102626591
Curta Calculator

Calculator is a partial cutaway of a Curta.

Type
Physical Object
Catalogue number
102647900
Curta Calculator, sales sample

From C. Gordon Bell's artifact website: "Case numbered B325.84 (B326 crossed out)." Case is actually numbered B325.87s [kjk 2010-01-29].

Type
Physical Object
Catalogue number
B325.87s
Curta calculator case

<p>From C. Gordon Bell's artifact website: "Contina Ag Mauren, 1 "Curta" Type II, Digital Calculator, 3 Register, Rotary, Mechanical, Liechtenstein, 513329, Instrument and Case, Buy.</p>

Type
Physical Object
Catalogue number
B326.84
Curta calculator

"BICKFORD" is hand lettered in green ink on creped, beige masking tape or drafting tape wrapped around the bottom part of the case.

Type
Physical Object
Catalogue number
X104.82
Curta mechanical calculator

Object consists of a mechanical calculator and a metal case with detachable, screw-on cap. Dimensions are object height and diameter (object is essentially cylindrical). This object has a white O-ring on the case. This object is labeled with the name of the Liechtenstein commune "Mauren.". This object has a domed crank with a single screw or pin securing the crank to the shaft and with the screw or pin aligned with the crank. What appears to be the driving slot of this screw is on the end under the crank handle. There are 6 "silver" studs in the top plate of the calculator, between the crank and the readout numbers. There are 5 "silver" studs on the bevel between the input sliders and the lower knurled ring.

Type
Physical Object
Catalogue number
X1275.96
Curta mechanical calculator

Type
Physical Object
Catalogue number
102716155