Questions for Brazil Empire experts, scans added

1960NYGiants

I just acquired a bulk lot of old coppers. I have identified one piece as a Brazil Empire 1822R 20 Reis. Dia is 29.9mm weight is 3.9g. Condition is VG.

19th Century Krause 7th edition states: KM360.1 20 Reis should be 7.17g no size given. 1822R Counterfeit with no values given while the original dates of the period have values at $2.25

So - how collectible is this piece? Are they common? Best guess as to value?

OK - so after getting some rest and rereading of the Krause section: Two things come to mind
1. Maybe it's an 1823R
2. Most likely struck an a 10 Reis flan
Krause does state that many are 15% or more underweight with some overweight specimens observed; the official weight for a 10 Reis is 1 oitavo (3.586g), a 20 Reis is 2 oitavos (7.172g)

I'll post a picture this weekend. terrible scans posted

Thanks in advance.

edit to add photos and further comments

LochNESS

<< <i>Dia is 29.9mm weight is 3.9g. … … Krause 7th edition states … should be 7.17g >>

So just to be clear, you believe yours is a counterfeit example because the weight is off? Or do you believe yours is genuine?

Sorry it's late here and I get confused by numbers when sleepy.

1960NYGiants

LochNESS:

1st line is my description of coin in hand
2nd line is Krause's, i.e. the catalogue states the date 1822R is counterfeit

LochNESS

But the weights are different, no? Sorry I don't have my catalog handy at the moment so I'm just going off your post. It says the weight should be 7.17 grams for the counterfeit? and all 1822R are counterfeits? And no values given (indicating it has no value). Considering your piece is about 3.3 grams light of the known counterfeit variety, I'd say it's not very collectible. But that's just my 2¢ based on my above assumptions being accurate. Maybe I am still confused about the cat listing.