Watch List notes:

SCOTLAND. Mary. 1542-1567. AR Testoon (26mm, 5.94 g, 2h). First period, Group IIIb Mule. Edinburgh mint. Dated 1557/1558. Crowned royal coat-of-arms; M R across field; no annulets below / Jerusalem cross. Burns 18/19 and fig. 793/794 (obv./rev.); cf. SCBI 35 (Ashmolean & Hunterian) 1014 (for type); SCBC 5406. VF, toned, flan a little irregular, minor roughness. Rare mule.