Chico spent most of his career with the Reds, of course, but was an Angel when he tragically died in 1971. The '71 team had lowercase lettering on the uniforms, so we can tell that this picture is from 1970.

This is an interesting pic of Chico, in that he's wearing #3 rather than #15, which he wore throughout his Reds career. (Apparently, Cinci had a system; catchers wore single-digit numbers, infielders 10-19, outfield 20-29, pitchers 30 and up.) So, probably a spring training shot, taken before Chico made the team.
But this isn't the 1964 uniform, it's the 1958-1960 version. (In 1961, the Reds put "Reds" inside the big C on the chest, with a black background, and put black stripes around the sleeveholes.) So had Chico been trying to make the big club for many years before he graduated from San Diego during the '64 campaign? Or were the Reds so cheap that they kept old unis around for the minor-leaguers to wear during camp?