2000 Poland 10 Groszy - Date Over Stamped?

Thanks for the reply DV.
I have checked the rest of the coin and cannot find doubling anywhere else. The second ring is on the other side as well.
If it was doubled you would expect the numbers to be all the same, but it looks like a 1 under the 2.

Steve

I doubt we're looking at an 2000/1999 overdate, but one would have to know how the hubs were dated to know for certain. I can only guess if they reused a 1999 master hub, the date would be ground away and 2000 added to the master die? Just guesses here.
There are overdates involving two hubs, but it usually involves the last digit--such as the Australia 1933/2 1d or the US 1942/1 dime.
I asked about notching because there might be a doubled die on the 2, or it could be Machine Doubling. I see something on all digits, but I'm just looking at one pic after all. The more detail, the better. When I study overdates, I'll shoot from several lighting angles to capture more details, such as this example:



A very typical appearance on a 2/1 overdate. I usually like to see the underlying digit protruding from the top or bottom to be certain.

Steve,
I found a good example of "notching" on a doubled die.
This happens two (or more) offset impressions on the die leave a visible gap in the devices (arrows).
That's why I wondered about the 2 in the date on your coin.

I have the same coin as the OP. I have messaged him and he gave me permission to post pics of my coin in his thread. Please, take a look at the date, tail feathers, webbed feet, and the letters R and Z in the first word and the letters S,K,A in the last word. I wanted to know if anyone can shed some light on the situation about why the coin shows these problems?
Thanks and here are pics!

Regarding the date area of the last coin posted--the "2000"
The "doubling" is irregular, on the outer edges of the digits, towards the rim of the coin.
Based on what I'm seeing, my guess is die wear.