Dubbeltje

When the decimal system came to the Netherlands (about 1800) the 10-cent coin was named a "dubbeltje".

In Dutch slang, a dubbeltje was named a beisje, from Dutch-Yiddish beis, the value of two stuivers.

The central opening in a CD is exactly the size of a dubbeltje.

Ik legde een dubbeltje op tafel en dat werd de maat."

("The fastest decision in the development phase was about the diameter of the hole in the CD.

Double Stuiver, 1758, Holland
10-Cent, 1948
10-Cent, 1950
10-Cent, 1993
Obverse 10 cent, 1942.