Watch List notes:

ITALY. Papal States. Roman Senate, Anonymous, 14th-15th century. Ducato (Gold, 21 mm, 3.55 g, 2 h), Rome. S PETRVS : - ATOR · VRBIS / SEn Saint Peter, nimbate, standing right, handing banner on a long staff to senator, on the right kneeling to left; at the base of the staff, rosette with P (?) to right. Rev. · ROMA · CAPVT · M-VnDI · S · P · Q · R · Christ standing facing, raising right hand in benediction and holding Gospels in left, within mandorla with nine stars (four to the left and five on the right); at the end of the legend on the upper right, small facing head of Christ. Berman 151. Muntoni 129. Lustrous. Some areas of flat striking, otherwise, good very fine.
From the Dr. Pelc Dens Sapientiae Collection and from the collection of W.R. Windsor, Jackson's, 20 March 2002, 1053.