Marbel Blood Cell Calculator

Marbel blood cell calculator 9112 ca 1921 the marbel blood calculator co chicago usa. Used to determine the proportionate number of different cells in a blood specimen. This calculator is dated 1922 and has a condition rating of 2 2.

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Pin On Vintage Industrial Design Computers

Pin On Vintage Industrial Design Computers

Calcolatrice Vintage Marbel Blood Cell Calculator Antiquariato Calcolatrice Ebay

Calcolatrice Vintage Marbel Blood Cell Calculator Antiquariato Calcolatrice Ebay

The Charles Babbage Difference Engine Vintage Industrial Design Computer History Charles Babbage

The Charles Babbage Difference Engine Vintage Industrial Design Computer History Charles Babbage

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