view any character set with only PuTTY and sqlplus

$ unset NLS_LANG
$ cat elementary.sql

select unistr('\201c') || 'Elementary,' || unistr('\201d') || ' said he.' q from dual;

quit
$ sqlplus win/win @ elementary.sql

Q
----------------------
?Elementary,? said he.

$ export NLS_LANG=.US7ASCII
$ sqlplus win/win @ elementary.sql

Q
----------------------
?Elementary,? said he.

$ export NLS_LANG=.WE8MSWIN1252
$ sqlplus win/win @ elementary.sql

Q
----------------------
Elementary, said he.

PuTTY Window->Translation->Win1251(Western).
Open new window.

$ export NLS_LANG=.WE8MSWIN1252
$ sqlplus win/win @ elementary.sql

Q
----------------------
“Elementary,” said he.

$ export NLS_LANG=.AL32UTF8
$ sqlplus win/win @ elementary.sql

Q
--------------------------------------------------------------------------------
“Elementary,â€

PuTTY Window->Translation->UTF-8.
Open new window.

$ export NLS_LANG=.AL32UTF8
$ sqlplus win/win @ elementary.sql

Q
--------------------------------------------------------------------------------
“Elementary,” said he.