Panama 100 Balboas 1975 500th Anniversary - Birth of Balboa. Obverse: Arms of Panama. Lettering: . REPUBLICA DE PANAMA . ********* PRO MUNDI BENEFICIO FM 900/1000 ORO FINO . 100 BALBOAS. Reverse: Bust of Spanish discoverer of the Pacific ocean. Lettering: VASCO NUÑEZ DE BALBOA 1975. Edge Reeded. Gold 8.16g. KM 41. In Packaging