Rare Myanmar Money

About 28 years ago,when I was a grade 5 student,I usually got 5 Kyats each day as pocket-money.But,now,these cash are very rare and not easy to be found.
Yesterday,I found these cash in my drawing book that I used in my childhood.
The person in these cash is our national leader,our hero who brought freedom for Myanmar,General Aung San whose daughter is,Daw Aung San Su Kyi,now,the state counsellor of the Republic of the Union of Myanmar.