Escudo de la Asamblea del Año XIII

 Tomado de Wikipedia.

Seal of the United Provinces of the Rio de la Plata (Assembly)

Coat of arms of the United Provinces of the Rio de la Plata (Argentina, 1813)

Trabajo propio - Autor: Samhanin

Fuentes: 

Sello asamblea soberana - Argentina 1813

National arms of the Constitutional Assembly of 1813, 

Anonymous (65,5 x 57 cm),

Museo Histórico Nacional. Buenos Aires. Inv. Nr. 42.

At the occasion of the First General Legislative Assembly sitting after 31 January 1813, a new coat of arms was provided for. Its origin is unknown. Of its form and meaning no decree or decision exists in which it is described and explained. It is for sure however that a shield with the arms was above the entrance of the building in which the assembly was held. This shield is preserved in the Museum of National History in Buenos Aires. (Fuente)

Se trata del Escudo Nacional, por supuesto, pero en la versión que se encontraba en el frente de la sede de la Asamblea del Año XIII, que se conserva en el Museo Histórico Nacional.