And here's an obviously Pakistani set, though with a Scottish-made chanter inserted.

https://www.ebay.com/itm/32477841891...0AAOSwcLphL~wc

All I can make out from the stamp is "O".

If we knew what letter was before or after the O, or how many letters total there were and in which place the O was, we would probably know.

For example

_ _ _ _ _ O _

could be MacLEOD but

_ O _ _ _ _


could be FORFAR.