Silver 28.1mm diameter, 6.54 gram.  M· THERESIA· D· G· R· IMP· GE· HU· BO· REG· Her bust right between palm and laurel branches.  R. ARCHID· AVST· DVX· BVR· SI· M· MO· 1763  around crowned double-headed eagle with shield of Bohemia on breast, on plinth inscribed 20.  Eypeltauer, Corpus Nummorum Regni Mariae Theresiae, 105a.  Good Fine