Because of the unstable
conditions in the interior, the director of the postal system in Lima sent a
communication to the headquarters of the UPU in Bern, Switzerland, saying
that he could no longer guarantee mail outside of that city. He changed the previous
oval overprint, deleting the word “Peru” and substituting the word “Lima”.Thus, on January 28, 1881, (11 days after
the occupation of Lima) a new set of overprinted stamps was issued to the public.