New purchase: crust-aceous 1820 Bust quarter

This is an 1820 Large 0 Bust quarter from the set I recently bought. I do not recall the die marriage for this one, but I do know that it scores a perfect "10" on the Original Crust Scale. I wish they were all as original as this one. I also wish this coin was an 1823/2 instead. Anyone have a genie I can borrow?

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I digress...
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Looks like you have an 1820 B-1 R-4.
This is the Large O / Large Stars obverse paired with Reverse L.
This obverse was also used to create the 1820 B-2 die marriage. Reverse L was utilized again in 1821 to create the B-2 die marriage.
In the latest die stage, a die chip develops in the 2 in the reverse denomination and shows up on all of the 1821 B-2's. It looks like yours is an earlier die stage before the die chipping occured.
As was pointed out, the rim bump is the only real distraction, otherwise it is a nice circulated Bust Quarter. I would think this is F-12 to F-15 as far as wear goes, but would be closer to the F-12 end due to the rim problem.
I also wish this coin was an 1823/2 instead. Anyone have a genie I can borrow?
You can borrow him as soon as I am done with him!!
QN
Go to Early United States Coins - to order the New "Early United States Half Dollar Vol. 1 / 1794-1807" book or the 1st new Bust Quarter book!
With that said, dam that's a nice looking coin and in just the same grade my Bust Quarter collection is being assembled in.