1991 AD., Poland, Warsaw mint, 20 Groszy, KM Y 280.

Poland, Republic, Warsaw mint, engraver: St. Watróbska-Frindt (rev.), 1991 AD.,
20 Groszy (18,4 mm / 3,12 g), copper-nickel, 3,20 g. theor. mint weight, mintage 75.400.000 , medal alignment ↑↑ (0°), reeded edge,
Obv.: RZECZPOSPOLITA POLSKA / · 1991 · , arms of Poland (the crowned white eagle, wings spread) surrounded with inscription translated "Republic of Poland" and year below; mint mark of the Warsaw mint: {mW} -monogram near the eagle's r. claw.
Rev.: 20 / GROSZY , big value number above denomination, surrounded with a stylized leaves coronal.
KM Y 280 .

Year / Mint Mark / Mintage
1990 MW 25,100,000
1991 MW 75,400,000
1992 MW 106,100,000
1996 MW 29,740,000
1997 MW 59,750,000
1998 MW 52,500,000
1999 MW 25,980,000
2000 MW 52,130,000
2001 MW 41,980,000
2002 MW 10,500,000
2003 MW 20,400,000
2004 MW 40,000,000
2005 MW 37,000,000
2006 MW 35,000,000
2007 MW 68,000,000
2008 MW 91,000,000
2009 MW 133,000,000
2010 MW 45,000,000
2011 MW 15,000,000