Watch List notes:

John V Palaeologus, with John VI, 1341-1391. Basilikon (Silver, 19 mm, 1.46 g, 12 h), Constantinople. Μ/ΘV - ΙC X The Virgin enthroned facing, nimbate, wearing pallium and maphorium, holding on her left rm the infant Christ, nimbate. Rev. ΙωΕΝΧωΤ - ΙωΕΝΧωT John V, on the left, standing facing, wearing loros, placing his right hand on his chest, and John VI, on the right, standing facing, wearing loros, placing his left hand on his chest, holding long cross between them. DOC 1195. LPC 142.5. PCPC (290). SB 2530. Extremely rare and quite nice for the issue. Very fine.
From the collection of a scholar.