Watch List notes:

BRITISH COINS, Scotland, Mary Queen of Scots, Silver Testoon of Two Shillings and Six Pence, 1558, type IIIb, crowned Scottish arms, crown with low arch, M to left, R to right, legend surrounding, MARIA. DEI. G. SCOTOR. REGINA, rev large cross potent, cross in each angle, legend and date surrounding, initial mark crown, .IN. VIRTUTE. TVA. LIBERA. ME. 1558., 2.16g (SCBI 58:388; S 5414). Darkly toned, likely caused by once being in soil, weak in parts of legend and a little undulating, about very fine and very rare.
ex Patrick Finn Memorial List 19, 2001, item 354

Estimate: £300-400