I came across this 4 reales cob on tonights' auction (Nr.18, lot 1121): I don't think the description is correct (Potosi, Philip IIII, KM17B). Could this be KM33.5 (Toledo, Spain, assayer P, 1621)? https://www.pecunem.com/world-coins/auction-18
Ahhh, I don't have my catalogs with me (am at the office) Indeed, there is something wrong, you have the Portugal escudo in the middle of the shield - this is a continental cob. Potosi has no essayer P for that period at least, the only candidat is indeed Toledo. I don't know all the variants, but usualy the small circle is above the T from the mint mark - but I suppose it's normal :)
Mint is easy : it's Mexico. Looks like a 2 or 4 reales (weight will tell). Clearer picture is necessary to know if it's genuine and to see possible details (it looks OK at least).
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