"I withdrew some US$ from the bank for travel and found these chop marks.
"There were notes from 2009A, 2013, and 2017A. However, all but one of these chops were on 2009A notes and the other from 2013. So perhaps the chop is no longer used or the newer notes have not circulated enough to pick up a chop.
"I was prevented from scanning them by the Cannon LIDE 300."