As a side note holes in old coins a indicative of an early form stashing or hiding coins. In fact the reason Chinese coins have holes in them is specifically to allow stringing them without destroying the coins. Particularly those who had very little money or some servants who were not allowed to have currency hid what they had on there persons in this manner.
On your coins the one on the right has been drilled, the one on the left the hole has been punched. The one on the left may have its hole for reasons other than to wear it.
Just a thought.