Here is history in action (and a second venture into currencies in a row)…
You’ll see that the price of this stamp is 12 cents. But over in the top left corner, crossed out, you can make out that it previously was 10d (pence, under old British currency notation). In 1965, when this stamp design was first issued, it came with the 10d pricetag. Within a year, the Bahamas had gained its own currency as part of a pathway towards independence from the British, produced its own coinage and updated their pre-printed stock of postage stamps – efficient!
Full independence for the Bahamas came in 1973, at which point Public Square changed its name to Parliament Square.
The question that I was left with: why is the British penny symbolised by the letter d? Apparently it all goes back to the Romans, via Charlemagne, and is related to the structure of pre-decimal currencies… Read the second link for more, as I don’t think I have room to explain!