SQL> create table tst (col varchar2(10), row_chng_dt date);

Table created.

SQL> insert into tst values ('Version1', sysdate);

1 row created.

SQL> select * from tst ;

COL        ROW_CHNG
---------- --------
Version1   16:10:03
SQL> drop table tst;

Table dropped.

SQL> select object_name, original_name, type, can_undrop as "UND", can_purge as "PUR", droptime
  2  from recyclebin
SQL> /

OBJECT_NAME                    ORIGINAL_NAME TYPE  UND PUR DROPTIME
------------------------------ ------------- ----- --- -------------------
BIN$HGnc55/7rRPgQPeM/qQoRw==$0 TST           TABLE YES YES 2006-09-01:16:10:12
SQL> flashback table tst to before drop;

Flashback complete.

SQL> select * from tst ;

COL        ROW_CHNG
---------- --------
Version1   16:10:03

SQL> select * from recyclebin ;

no rows selected

Reference:

http://www.orafaq.com/node/968