Perforation Shift error on Indonesia Stamps -1966

In 1966 Indonesia issued a set of Stamps on President Sukarno. One of the stamps was a One Rupiah stamps. A Block of four one Rupiah stamps is listed in which the perforation has shifted and as result, the bottom portion with “Republik Indonesia” has shifted and become part of the lower stamp. The shifting is marked by red arrows. An interesting error.

indonesia perforation shift error
INDONESIA 1966 -PRESIDENT SUKARNO – PERFORATION SHIFT