Dear colleagues:

The Italian engineer Roberto Guatelli was a world-famous model maker. 

He built many models based on the drawings of Leonardo da Vinci for IBM New York.

Moreover, he made replicas of important historical calculating devices:

machines of Pascal, Leibniz, Babbage, Hollerith and Steiger/Egli (Millionaire).

Several replicas are preserved in collections in New York, Ottawa, Mountain View, Pittsburgh, and Milan.

I am very grateful for information on additional replicas:

a) Did Guatelli build replicas of other calculating machines? Which?

b) Have these replicas survived?

c) Where are these replicas?

d) Do you know more about Guatelli's life?

Many thanks for your help!

Best,
Herbert

Communications of the ACM:

The Model Maker of Leonardo da Vinci, Blaise Pascal, and Charles Babbage

https://cacm.acm.org/blogs/blog-cacm/233366-the-model-maker-of-leonardo-da-vinci-blaise-pascal-and-charles-babbage/fulltext

Meilensteine der Rechentechnik, volume 1

https://www.degruyter.com/view/product/480555

 

Meilensteine der Rechentechnik, volume 2

https://www.degruyter.com/view/product/503373

 

 

Amazon

https://tinyurl.com/y9upwagp