Pamplona, Spain, 1 real, Ferdinand II (King of Navarre, 1512-1516), crowns in upper-left and lower-right quadrants and upright F's in other quadrants. 2.87 grams. XF or so, with full legends and inner details, very light surface porosity, high catalog value for this variety in CT but lower in Cayon (which lists this under Ferdinand V of Spain, even though he reverted to Ferdinand II of Aragon upon Isabel's death in 1504).
Estimate: $80 - 120