Hi, @Harold Garrett! Welcome to CT. I didn't dig into a Red Book (see https://en.wikipedia.org/wiki/A_Guide_Book_of_United_States_Coins) but I checked out Numista (see https://en.numista.com/catalogue/pieces3366.html). I see that there is a "copper-nickel clad copper" version (copper core sandwiched between two copper-nickel slices) and a silver version (.400 - or six-parts copper to four-parts silver). I'm going to assume you have the copper-nickel version (or type). As stated above, I don't see any mention of a 'matte finish.' I think what you have there is a Philadelphia minted Type-2 thin lettering Ike dollar. And I think your coin has been circulated, and is a tad worn, which probably explains what you described as a 'matte finish.' Not an error, just circulated. Best regards, David
I think that's just the way most circulation-strike Ikes look after a while. It's certainly true of most of the ones I've seen.