Brazil 960 Reis Variety

Saw a user post this 960R on Discord the other day and the overdate was very clear. One problem that I saw was that Rio didn't make any 960R's in 1809. Only 1809 dated 960R's are Soho Mint patterns and the dies / design elements were different enough to rule out modifying those for Regular striking.
Haven't seen another example of the 1810/09 overdate, but I also don't have the right references available. I do have Levy's book, but it goes more in-depth on what the coins were overstruck on vs varieties of the dies themselves.
I don't think @960Coins posts anymore and his blog has been inactive for a while, but hopefully someone can provide an opinion. @Hyperion @jayPem @Weiss @jgenn @gxseries
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After a bit of digging, I was able to find another example of this overdate in an October 2000 UBS auction. Failed to sell at 180CHF estimate. Description just mentions the overdate but doesn't give any additional commentary.
8 Reales Madness Collection
How I long for the days when a nice 960R like that wouldn’t sell for $200!
We saw one example of the 10/09 in a CoinTalk thread. It will be near the bottom of the page.
Nice! Another example of this overdate. However reading through that thread there doesn't appear to be any follow-up from Gallienus after images were provided.
Here's a copy of the post from CT:
8 Reales Madness Collection
Thank you for sharing this!
8 Reales Madness Collection