Brazil
Pedro II copper Pattern 20 Reis 1861, KM-Pn90, Russo-E048a, MS63 Brown NGC. Seemingly choice for the grade with an absence of marks or noteworthy handling and medium brown patina on the both sides that lightens around the reverse motifs. Apparently quite rare with no other examples of the type showing up in searchable digital archives.
Estimate: 800-1200 USD