Regarding David Pickup's question about holes found in Indian silver coins, Kavan Ratnatunga of Sri Lanka writes:

Kavan referenced this entry from the Fitzwilliam Museum's Numismatic Glossary:

Ken Spindler of San Diego writes:

Shailendra Bhandare writes (in a note to David Pickup):

Ken adds:

David Pickup writes:

To read the earlier E-Sylum article, see:
NOTES FROM E-SYLUM READERS: OCTOBER 9, 2016 : Query: Holes in Indian Coins(www.coinbooks.org/esylum_v19n41a12.html)