Royal Dutch Mint roll containing circulated coins

[eurocoin]

While browsing the Dutch online marketplace Marktplaats, I came across an interesting listing for a strange roll of 1 euro coins of Royal Dutch Mint. Instead of Dutch coins, the roll contains at least one French 1 euro coin dated 1999. The ad mentions that both coins on the outside of the roll look like they are used, but I am really not sure about that. The roll was around 2002 obtained from a commercial bank. The employee of the commercial bank from which the roll was obtained apparently said that it was a mistake and that the rolling paper of Royal Dutch Mint should not have been used. But this seems strange, as circulated coins are being rolled by the cash centres, which are completely separate. A theory that I could think of was that maybe the cash centres had an urgent shortage of rolling paper and Royal Dutch Mint supplied some, which may be a possible option here.

Royal Dutch Mint is not known to have ever minted any French euro coins, and even on the off chance that they did actually manufacture any, it would make very little sense for them to then release them into circulation in the Netherlands.

Another possible theory that I can think of is that maybe the Netherlands in the early days had a shortage of 1 euro coins and France supplied some to the Netherlands in bags or other unusual packaging, with Royal Dutch Mint having been tasked to put them into rolls. But I am really not sure about that theory either.

Lastly, there is a tiny chance that somehow a mint employee dropped a foreign 1 euro coin in a batch of newly minted Dutch 1 euro coins, but that would also be very unlikely.

It would be interesting to know what the other coins in the roll are.

[eurocoin]

The roll contained lightly circulated coins with the dates being in the date range 1999-2002. All Dutch coins, except for the French piece that is visible in the photos. This eliminates most of the theories mentioned in my post above. It remains strange that circulated coins ended up in Royal Dutch Mint rolls though. It was apparently the only such roll the seller came across at the time.

The only options that remain are that rolling paper of Royal Dutch Mint was supplied to the cash centres, either by mistake by the manufacturer of the paper, or by Royal Dutch Mint itself as the cash centres had a shortage. Either that, or Royal Dutch Mint was at some point in the early days of the euro, itself temporarily tasked with handling circulated euro coins.