ITALY, Papale (Stato pontificio). John XXIII. Antipope, 1410-1419. PB Seal – Bulla (31mm, 54.16 g, 12h). • IOhAn/nЄS : P P :/ · XXIII : three lines / Head of St. Peter and St. Paul facing slightly right and left, respectively; long cross between, S PA S PE above. Serafini 33-5. VF. Rare.