Mexico
Carlos & Johanna Cob 4 Reales ND (1544-46(?)) M-G, Mexico City mint, KM18, Nesmith-50, XF45 NGC. An attractive specimen. The issues of assayer Juan Gutierrez (G) are currently assigned to the 1544-46 period, although no definitive evidence of this has been put forward by the current scholars of these series.
Estimate: 250-300 USD