Panama - Panama City, Central Ave    La Avenida Central - fascinante e interesante - principal vía del comercio de la Cuidad de Panamá, República de Panamá.    Central Avenue - fascinating and interesting - main business street of Panama City, Republic of Panama.    postmarked in 1967 with a 6c Canal Zone, Isthmus of Panama stamp , lived there in 1967-68