PAMPLONA. 6% Obligacion Hip. de 500Ptas. brown, yellow. #6000. No 729. The dam at Egea de los Caballeros (Navarre) was on the river Arba, which flows from the Pyrenees into the Ebro above Zaragoza, and served for flood-control and irrigation. Very decorative share, showing the dam, and a superb border of cornucopias, angels, amphorae and much else.