This is one of the last years that accurate mintage numbers were given for 20 groszy coins. Since 2008 no productions figures have been officially released. Still the ease of finding them suggests the are common.
Here's the stats...
Type/Country: 20 Groszy / Poland
Value: $0.20 in VF
Do you have a coin from Poland and want to know its value? Leave a comment/question and I will do
my best to find out the price and history for you.