I don't know what to make of this. It's an ordinary 1961 New Zealand Penny, but instead of bronze colored, it's a kind of silvery color. I'm assuming a bored person plated it or sprayed it with some kind of metallic paint. I don't expect it has any numismatic value, but I'm curious as to what is going on and why. Any guesses? The edge has a weird almost reeded texture. It thought about maybe a vice mark from being held, but they go all the way around pretty evenly.
It's certainly been plated; I've run across several of these myself. However, with the faux-reeding, I wouldn't be surprised if somebody tried to pass it off as a higher denomination coin at some point.
Interesting, thanks! It says "One Penny" so prominently I would imagine one would need a pretty inattentive target to pass it off. Weight was 9.3 grams, which is a little lighter than I would have expected. At 31 mm it's a little bigger than a NZ florin and smaller than a half crown, but much too light for either of them. I don't imagine that it would fool any vending machines. (Did New Zealand even have those commonly in the 1960s?)
I have no clue about vending machines, but the example I have is holed and it doesn't have faux-reeding like yours. Regardless, the reason why it is plated is probably that someone was bored as you said.