Watch List notes:

Mexico Onza 1979 Medallic issues (2) each 33.6 grammes of 0.925 silver (0.999oz) Left scale pan points between U and N of UNA (type IV) KM#M49b.4 both UNC and almost fully lustrous UNC, Onza 1983 KM#494.1 Lustrous UNC with an attractive tone

Estimate: 40-60 GBP