Dare I ask if there's an 11?
It looks like you just dared.

The number 11 is the favourite of Dutch carnaval revellers, as it is considered the number of the madcaps. Some results are
here. I suppose 13, 17, 19 and higher prime numbers will be slightly more difficult

I cannot think of a denomination 11 on coins. The closest is a Dutch 17th century schelling of 6 stuivers. In 1672, the Republic was attacked by England, France, Munster and Cologne. The attackers were repulsed one by one, but inflation was rampant and minting discipline was gone. Bad silver schelling pieces became commonplace. Holland led the way to a total coinage reform in which good silver schelling pieces had to be counterstamped (like the attached piece) to circulate for 6 stuivers. Schelling pieces without the counterstamp were declared valid for 5½ stuivers only, so that two of these coins were worth exactly 11 stuivers.

Peter
Coin source: MaXoN op de Nederlandstalige Wikipedia