The old currency in Greece was the DRACHMA.
Color images of the 6 Greek banknotes (front and back) are shown below.
(Click on the images to see enlarged versions):
100 DR 100 DR 200 DR 200 DR 500 DR 500 DR
1000 DR 1000 DR 5000 DR 5000 DR 10000 DR 10000 DR

Download a pdf file with the above 12 images all in one page for easy reference.
See all the pictures together here.