Watch List notes:

SPAIN, Castile & León. Juan I. 1379-1390. BI Blanca (21mm, 1.38 g, 4h). Burgos mint. Struck 1385/6-1390. Agnus dei standing left, head right, banner over shoulder / Crowned V; B S flanking. ME 1463; cf. MEC 6, 619-20. Iridescent toning, faint porosity, slightly weak strike. VF.