They are. Why? Because nickel-plated coins have a different corroded appearance.
Administrateur du catalogue, référent de nombreuses nations antiques et de la Lorraine.
Catalogue administrator, numerous Antique nations and Lorraine referee.
Administrateur du catalogue, référent de nombreuses nations antiques et de la Lorraine.
Catalogue administrator, numerous Antique nations and Lorraine referee.
I don't have these coins and on the picture I can't see whether the surface is Nickel or Steel. It looks a bit suspicious to me that both types were minted in the same year. That's why I thought someone may have made a mistake and created a new page for the coin. But if someone really has the two different types it's OK. I didn't find these coins in NGC and my catalogue.
I'm not orange and also in other things I'm not a Donald at all. DonChori like Don Felipe or Doña María, por favor.
These new coins aren't in the 2015 Standard Catalog of World coins yet, but Krause is always a few years behind, so those coins will be in one of the next editions.
Countries don't wait till January 1st to issue new coins. So there is nothing suspicious about more than one type minted in the same year. There are hundreds of other examples.
Here is one example a lot of members will know because a lot of them collect USA by date: 1 cent Lincoln Memorial 1982. In the course of 1982 the Lincoln Memorial cents changed from bronze to copper plated zinc and both types were minted the same year:
If it's not a mistake of the catalogue, everything is well.
Your examples are good, but there are also enough examples of countries that plan their emission of coins annually (e.g. Eurozone, but also Bolivia, Macao, Australia...)
I'm not orange and also in other things I'm not a Donald at all. DonChori like Don Felipe or Doña María, por favor.