"Koningin Wilhelmina" is Dutch for "Queen Wilhelmina", and what you have is a coin from the Netherlands (or, conceivably the Netherlands East Indies, the Netherlands Antilles or Curacao). However, the Netherlands produced no coins in 1920, Nor did the Netherland Antilles or Curacao, and the Netherlands East Indies produced not coins mentioning Wilhelmina in 1920. Please re-check the date.
Have a look at http://en.allexperts.com/q/Coin-Collecting-2297/2008/7/1869-2-1-2.htm
11 euro cents
The value of a 1938 2.5 gram Nederlanden coin can vary depending on its condition and rarity. It is recommended to consult with a numismatic expert or check online marketplaces for current pricing information.
Beatrix Wilhelmina Armgard (Baarn, 31 januari 1938
There were no 1938 New Zealand Halfcrowns minted from 1938 to 1940 inclusive.
one thousand
A 1938 Lincoln Cent in good (G-4) condition carries a value of: 5 cents.
The Theory of Investment Value was created in 1938.
There is no Australian "cent" from 1938. Decimal currency was introduced in Australia in 1966.
1 dollar
Average value is $3.00-$5.00 for most coins, 1938 was the last year of issue and all were struck at the Denver Mint.
Retail value is $4.00-$8.00 in average circulated condition
5 euros
2500 in good condition