1820/19 Crown?

Hi Everyone,
I was going through some of the coins I had and I found this 1820 crown. Looking through the Spink book, I realized that there was an 1820/19 overdate. I was wondering if this is that variety? The last pic attached is an example of an overdate that was certified NGC AU-55.
I would appreciate any help!
Thanks!

 

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I don't collect foreign coins, but that looks pretty good to me.

 

Just guessing, but figure this is not an inexpensive coin to purchase.
Very nice piece,
J.T.

 

I don't collect errors or anything, but in my opinion, it appears to be the overdate variety.

 

It's certainly 2 over 1, but whether there is an underlying 9 is not clear. Both 18(2/1)0 and 1820/19 are valid options. The 2 over 1 is usually clearest because it fills in the inner angle of the 2 to give a vertical edge rather than a sharp point. This 2/1 is clearer than many.