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7 résultats pour : calculation aids

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Slide rule on book, calculating aid
BRK25B71_379

Slide rule on book, calculating aid

Slide rule on book, calculating aid
BRK25B40_458

Slide rule on book, calculating aid

Slide rule on book, calculating aid
BRK25B49_071

Slide rule on book, calculating aid

Abacus calculating aid, calculating with spheres, Hamburg, Hamburg, Federal Republic of Germany
BRK24I19_146

Abacus calculating aid, calculating with spheres, ...

Abacus calculating aid, calculating with spheres, Hamburg, Hamburg, Federal Republic of Germany
BRK24F73_316

Abacus calculating aid, calculating with spheres, ...

Close up hand using pencil
BRK23E99_071

Close up hand using pencil

Calculate monthly payment concept
BRK23E36_128

Calculate monthly payment concept