Watch List notes:

Brazil (Rio mint), 640 reis, Pedro II, 1699/8, unlisted overdate. LMB-unl (cf 136); Gomes-24.02; KM-unl (90.1 for type). 18.77 grams. Bold AU- with deep toning around details, very clear overdate that is listed in Gomes but not in LMB (formerly Russo) or KM but several examples are known.

Estimate: $350 - $700