Back 'in the day' coins were holed and a piece of cloth was looped thru them -- with a knot in between each-- in order to keep them safe, and not lose the coins.
This was considered a kind of urban legend thing, until a Civil War uniform was found about 15+ years ago, with a string of coins tired together in that manner.
As for yours?
It looks like this hole is very round, and not rough as most contemporary holes are.
It looks like it was drilled with an electric drill, to my eye. But, hey, what do I know, I wear glasses.