This admittedly somewhat grainy picture is actually quite revealing in the sense, that we get a rare close-up of at least most members of Rodolfo Biagi’s orchestra in the very important years he worked together with Jorge Ortiz. Biagi is shown seated at the piano, and Ortiz (young face, with a moustache) is standing next to him, to the right. If you recognize anyone else, please let me know in the comments.