Thanks for the replies. It makes sense that they'd be from New Zealand given I'm from New Zealand and my grandfather's family immigrated here.

These cards have been in my family for a very long time, a few cards are missing, and they are worn and hard to shuffle. I am thinking of selling them, but before I do this I'd like to find out if anyone can identify what brand they are, or the age. They are unmarked, and I do not know much about cards apart from the fact that I like to play poker with them. I have included a picture of the face cards, a joker, ace of spades, and the back design. The rest of the cards have nothing unique or distinguishing about them. I hope you can help! 😊