Watch List notes:

Spain 4 Reales (2) 1776 Madrid, mintmark Crowned M, PJ KM#413.1 VF nicely toned, comes with old collector's ticket 'Seaby 1957 EF 16/-', 1796 6 over 4 Madrid, mintmark Crowned M, MF KM#431.1 VF the overdate unlisted by Krause

Estimate: 50-100 GBP