Watch List notes:

BRITISH COINS, Scotland, Mary Queen of Scots, Bawbee, Billon issue of Sixpence value, Stirling, crowned thistle, M to left, R to right, beaded circles and legend surrounding, MARIA D. G. REGINA. SCOTORV, rev cross potent, cross in each angle, beaded circles and legend surrounding, OPPIDVM. STIRLINGI, 1.56g (SCBI 58:443-462; S 5434). Almost very fine, toned and rare.
ex Patrick Finn, List 9, 1997, item 376
These pieces, struck at Stirling only from June to November 1544, were for Mary of Guise, mother of the infant Mary Queen of Scots. This small issue was the last to be struck outside of Edinburgh.

Estimate: £200-300