Watch List notes:

Mary, billon bawbee, first period 1542 – 1558, issue three-fourths alloy, class Vd, obv. crowned thistle dividing MR, MARIA [D] G R SCOTORV[M], rev. voided saltire cross through crown, cinquefoil each side, OPPIDVM EDINBVRGI, no stops, wt. 1.98gms (S.5433), slight edge chip, for issue almost very fine, rare
Burns fig. 854 no. 63
BNJ 1989, pp. 133 – 150, plate 13, no. 77/8
SCBI vol. 58, no. 684 – 686, none in vol. 35
Richardson no. 126

Estimate: 150 - 200 GBP