Watch List notes:

SPAIN, Castile & León. Juan I. 1379-1390. BI Blanca del 'Agnus Dei' (21mm, 1.39 g, 11h). Burgos mint. Struck from 1385/6. Agnus dei left, head right; banner behind / Crowned Y; B S flanking. ME 1461; cf. MEC 6, 619 (for type). Toned, some porosity. Near VF.