The cancel on this Panamanian stamp says it was done at "JUSTO AROSEMENA" but I find no town with that exact name in Panama. I did find an Arosemena. So I thought maybe it was a post office on Avenida Justo Arosemena in Panama City. But I haven't been able to find one there. Can anyone help me to find what I am missing? Thanks in advance.
