The Black Boxer, juego mecánico de feria

"The black boxer", fairground force-measuring device, cast iron painted,
(height: 2 m, weight: about 500 kg)

Here is the description of a similar model made by Jean Lemaitre in his book "100 years of Slots": "The adjustment at left changes the tension springs according to the player category (low, medium, high). If the punch is not hard enough, the player can replay; on the contrary, if the punch is hard enough, it turns the needle to the last quarter of the dial, eyes light up and
the athlete screams: "Harder, harder!"