Golden Gem Adding Machine Explained

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The Golden Gem or Gem Adder, the Golden Gem Adding Machine was a portable, small, and easy-to-use mechanical calculator that does both addition and subtraction operations, although specialized in addition.

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3 Facts about Golden Gem Adding Machine

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The moving force behind Golden Gem and Automatic Adding Machine Company was Abraham Isaac Gancher.

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The Golden Gem 10-key calculator was introduced in 1907 by the Automatic Adding Machine Company, New York, and was based on the first similar patent in the USA, taken by Nobyoshi H Kodama (patent №US753586).

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Golden Gem Adding Machine: How It Worked

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Golden Gem Adding Machine: Historical Significance

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Golden Gem Adding Machine Explained

Everything You Need To Know

The Golden Gem or Gem Adder, the Golden Gem Adding Machine was a portable, small, and easy-to-use mechanical calculator that does both addition and subtraction operations, although specialized in addition.

3 Facts about Golden Gem Adding Machine

Although specialized in addition, the machine can also subtract using a dedicated method.

1

The Golden Gem Adding Machine was designed by Abraham Isaac Gancher but introduced in 1907 by the Automatic Adding Machine Co., New York.

2

The machine was originally sold for $10 per unit.

3