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Addo-X 50's collectible calculating machine - $100 (Las Vegas)
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This is an Addo-X electric adding machine, a vintage mechanical calculator.
It features a 10-key design, indicated by the "X" in its name.
The machine operates mechanically with a printing function that uses a paper roll.
It was manufactured by the Swedish company Addo, known for their durable calculating machines.
It is considered a collectible vintage office item, likely from the mid-20th century