Dutch wokkel

[Figleaf]

This used to be a 10 cent coin 2001 of the Netherlands. It has been bent in a W (or M) shape to indicate that it is no longer valid. The technical term seems to be "wokkel", after a chip of vaguely the same shape. When the country introduced the euro, there was neither the time, nor the capacity to melt all the old coins. To make them "harmless" they were treated this way. They are not rare and even sold as souvenirs of a major currency reform that changed the European landscape.

Peter

[chrisild]

Face value wise, I can beat that.   I have a few "Mark wokkels" here: 1, 2 and 5 DM from the 80s and 90s. (Lousy photo, I know.) Don't think there is a German term for such pieces, but the machine that made the marks on the marks, so to say, was/is called Decoiner.

This way transportation (and thus insurance) costs could be reduced dramatically: The coins go through a decoiner located nearby the place where they were collected. Once decoined, they can be transported as scrap metal to wherever they are then processed. This was primarily done with the Cu-Ni pieces, but some "copper" and "brass" coins were also decoined ... for coin and curiosa collectors.

Christian

[Kid Romeo]

Interesting to know the European terminologies. Thanks for info guys. 
I'm more acquainted with the American terms. They are called 'Waffle coins' or 'Waffled Coins' in US and the rollers used to waffle the coins are simply called 'Waffle Canceling Rollers and of course these coins don't come cheap. Will set you back by $25 for a slabbed waffled coin. Pics of a waffled Kennedy half and a Waffle Canceling Roller below.

[chrisild]

Here is a better photo of "my" 1 DM coin. Well, of one that looks like mine. You can see that the structure or pattern is different from the US waffled coins. And of course the DM pieces are, or at least were, not exactly expensive ...


(Image: Der Spiegel)

I also have paper money worth a few thousand euro here. Old DM notes and also some euro notes. Too bad they all went through a shredder, and the single pieces are roughly 1.5 mm wide and between 1 and 2 cm long.

Christian

[BC Numismatics]

There is one word I can use to describe these; Munted.

Aidan.