Cryptonym: AMSTALK-1
The document lists AMSTALK-1 is the assigned cryptonym of Miguel Angel Diaz Isalgue.
An CIA Office of Security memo that states AMSTALK-1 would be traveling from Argentina to the United States. AMSTALK-1 used the travel alias Juan Hidalgo Elizondo Romano, was used by the Agency operationally since 1961. Also see 104-10113-10209, documenting his return under that pseudonym.
A memo that reaffirms the identity of AMSTALK-1 and that he would be travelling to Miami.
104-10225-10009: CIA FILE ON ()SHELL-5
4/3/68 memo from Robert Fambrini, CH/4/Argentina. Formerly known as AMOTIN-117. Marginalia refers to him as 201-304337 (Note: review 201 number). As AMOTIN-117, used the name Juan Hidalgo Elizondo Romano.
4/5/68 memo from Chief of WH Division William Broe to Office of Security/Alien Affairs Staff, Attention: Louis Weinchowski, re 5 April 1968 Memorandum requesting documentation for AMSTALK-1: "It is requested that a Form I-512 be issued in the name of Juan Hidalgo Elizondo Romano (travel alias to be used by AMSTALK-1) to allow his re-entry into the United States from Buenos Aires, Argentina...AMSTALK-1 has been used operationally since 1961."