SQL & PL/SQL :: How To Find Extended ASCII Characters From A String

I have a table like mentioned below

create table test1( test_no number, test_description varchar2(100));
insert into test1 values (1,'ABC£¥');
insert into test1 values (2,'BCD£¥');

Now I am selecting from the above table and the expected rest it should have shown is as shown below

TEST1
-----------------------
TEST_NO TEST_DESCRIPTION
1 ABC£¥
2 BCD£¥

But instead of showing the extended ascii characters, it is showing some different characters as shown below

select * from test1;

TEST1
-----------------------
TEST_NO TEST_DESCRIPTION
1 ABCLY
2 BCDLY

I have an requirement where i need to fetch the exact ascii characters for £ and ¥ instead of L and Y respectively.