2010 Olympic Set With Incorrect (Double) Coin

Cool! I don't plan on selling, but it's neat to find something like this.

Here are the images!

So the first ones are of the "normal" set:







This is the set with the packaging error:







The sets are otherwise in good condition, have the hologram on the back, and, since they were purchased from the same place, have sequence numbers on them that are _very_ close together.

A word of caution here...

While some packaging errors can be worth a premium (often minor), they are usually the type that had to occur within the Mint and not once the package left the Mint. For example, the wrong mix of coins in a RCM-sealed Uncirculated Set.

But when there is easy access to the coins, such as in a Collector Card like you've presented, who is to say that one or more coins weren't swapped out to make an "error" set. Coins can be carefully removed and replaced in these cards, so savvy collectors would be very cautious about purported error sets.

I'm not saying that's the case with yours, but it is for this reason that many collectors are skeptical and wouldn't pay a premium.

I have this same set, which came directly from the mint. And like mberteig says, there is plastic covering both sides of the coin. I'm not sure how you could tamper with the packaging without it being obvious. Now I have to check and see if all the coins are different in mine when I get home!

I apologize, I do not own the set under discussion and could not tell from the images presented that it was sealed in plastic on both sides. My comments were directed to unsealed sets that I have come across in the past that were purported to have an error of some sort -- I thought this set was similar.