Watch List notes:

Granada, Spain, 1 real, Ferdinand-Isabel, cross-topped o flanking shield, mintmark Gothic G on reverse. CT-321. 3.37 grams. Excellent example of Gothic lettering including the distinctive Mexico City-style X (only found on coins from the Granada and Burgos mints), inverted castles and G (first we have seen), superb full flan with 100% details, all choice and attractively toned, XF.

Estimate: $600-900