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And in the same museum, you can also see this one from Marcel Lutz :

Dynamomètre Marcel Lutz

This is a french company which was created in 1978.

Thanks for the link, the welcome and the compliment :) I'm part of a French non profit association, and we are doing animations with traditional games and others. I was visiting your forum, because we have a machine called Dynamomètre in France (dynamometer) : https://www.wellouej.com/blog/dynamomet...

The last 3 videos are private unfortunately! Do you have more information on the Nénette grip tester? Thanks.