Alfonso Veady ? There was this posted on facebook in 2019 :
"Spaghetti western
tdAaloSpopnreisrolrnc 7,ets 2e01dd9lt ?
Por fin se ha identificado 53 a?os despues de rodarse y estrenarse EL BUENO EL FEO Y EL MALO al personaje mutilado, al medio soldado que informa a Sentencia (Lee Van Cleef) del paradero de Maria, la esposa de Carlson para el tema del botin....
En un golpe de facebook alguien ha informado que se trata de Alfonso Veady.
Perdio las piernas en la guerra civil y de vuelta a Madrid regento una joyeria, do de conocio a gente del cine.
Tambien aparece en LOS GEMELOS DE TEXAS de 1964 en una escena en la que aparecen cuatro cowboys juntos pero de medio cuerpo para arriba y el en el medio, seguramente subido en alguna mesa o taburete que no se ve. Seguro que aparece en algun otro film.
Finally identified 53 years after filming and premiering GOOD UGLY AND EVIL to the mutilated character, the half-soldier informing sentencing (Lee Van Cleef) of the whereabouts of Maria, Carlson's wife for the subject of the subject of the loot....
In a facebook hit someone reported that it's Alfonso Veady.
He lost his legs in the civil war and back to Madrid regento a jewelry store, met people from the cinema.
He also appears in TEXAS TWINS of 1964 in a scene where four cowboys appear together but half-body up and half-body in the middle, probably climbed on some table or stool you don't see. I bet he's in some other film."
I 've watched Il gemelli del Texas (1964) ad I think Alfonso was in the background, in the saloon.Uncredited tho.I've made a screengrab, quality is not very good but I didn't find it anywhere else.
Here's a comparison :

I will try to submit this on Imdb.