the number of copies minted in the year - 15 000 000
metal - Cu/Ni (MN25)
axis - ╦ ╦
diameter - 18,5mm (0,73")
weight - 3,15g (0,111 oz.)
catalogue numbers - CHAŁ:4.7.19.a;
edge - reeded
obverse designer - Stanislawa Watrobska-Frindt
reverse designer - Ewa Tyc-Karpinska
notes - on the obverse, some letters in legend are wider
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| 20 GROSZY 2011 - I 2 a - mint error - obverse |
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| 20 GROSZY 2011 - I 2 a - mint error - reverse |
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