Brazil
Pedro II Counterstamp 20 Reis ND (1835) AU55 PCGS, KM436.1. The counterstamp is upon a 40 Reis 1825-R. The counterstamp is graded UNC details, and the host coin AU55 by PCGS. A partially obliterated counterstamp of 1809 is present as well.
Estimate: 300-500 USD