It might just be from too much time on my hands and an idle mind, but are there errors or varieties for the token (or any other) coin denoting which mint it's from in the mint sets? I never really pay much attention to these when looking over a set and don't know what process is used to make them. If there is, it would just give me another reason to dig them out and look them over again. I'm not talking about the plastic pogs in the proof sets, just the metal tokens. What can I say, it's how my mind works...
I seem to recall from some years ago a thread or post where somebody actually collected those things. So to answer your question there probably are some varieties, though I don't know about errors. And there's probably somebody somewhere who knows about them. Off the top of my head, I'd ask @Conder101 and @cladking - either or both may know about it.
I do collect them. All of them. Indeed I once found what looked like gold foil in a mint box I was discarding was actually a 3/4 OZ 10k gold bar. There are no varieties in US mint and proof sets, however, I think I remember a minor variety in metal souvenir set token. I'd have to check. There are a few 'error" tokens but these are minor and mostly on the plastic ones. I believe the lack of varieties is caused by having a single striking of them. When mintage isn't known before hand they save the dies.
Interesting question.. I googled different combinations of the word such as Mint Set Token Mint Error and nothing really came up. There might be some type of error but I have never seen or heard of one. I have always looked carfully at any I have come across to see if anything was off on them.. But I do that with all coins!
I would think that since the P and D tokens were struck on cent planchets by the coinage presses there would be no reason why there couldn't be errors such as MAD off-centers, die cracks, or plating problems. But I will admit I can't recall having seen any. The much smaller press runs needed for the tokens might make for better quality control.
And those smaller runs may also result in any ooopses being thrown away. Just like what happens with ooopses of regular coins - when they are found.
Revisiting this post as I have found one of the larger sized P mint medals with a nice die clash on it (will post pics later).
