Luigi Testi's first caliber given to him by his father in 1938

Luigi Testi's first caliber given to him by his father in 1938
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Description

The first Testi Luigi caliber purchased from him by his father in 1938.

History of the Caliber:

The history of dimensional instrumentation begins with the invention of the vernier, conceived by the Portuguese Pedro Nunes, who in 1542 published the description of an ingenious system for measuring small arcs with sufficient precision. The German Ciavius ​​(1604) was responsible for the improvement of the vernier, and the Frenchman Pierre Vernier (1631), from whom the name "vernier" was derived, was responsible for the current form of the vernier caliper. The vernier caliper is the most widely used measuring instrument in mechanical workshops. What is a caliper used for? It is used to carry out measurements to the nearest fraction of a thousandth