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Thales Patent calculator, model DER 74799
Object type: calculator
Place made: Germany
Materials: metal; plastic
Measurements: 15"x 5.5"x 6"
Dark grey blue calculator with white numbers, can perform addition and subtraction. Two registers, lower one is on an independant carriage. Clearing lever on right, calcuating lever also on right. Two slide to mark decimals is broken. Multiple misc. levers on right.