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Diskussion:Peters Adding Machine
"The price of $235 was quite high, because at the same time Add-Index 5 columns cost $100, 7 columns $150, 9 columns $200, Barrett 9 columns $88, Corona 7 columns $60, 9 columns $100, Burroughs Class 1 (glass sided) 9 columns $325, 11 columns $450, 13 columns 535, 17 columns $750, Burroughs Class 4 10 columns $425, Burroughs Class 8 (Portable) 6 columns $80, 8 columns $100, 10 columns $125, Dalton 8 columns $100, 9 columns $175, Ellis 8 columns $450, Federal 9 columns $200, Sundstrand 8 columns $100, 10 columns $125, Victor 6 columns $75, 8 columns $87.5, 10 columns $125, Wales 6 columns $125, 7 columns $175, 10 columns $250. The cheaper adding machines are much more common. Ellis costing $450 is evidently extremely rare".(T. Leipälä)