Examples of the type

Private collection
2006-Tem-13 – (en) Prefix: R-U; Printer: F-CO; Signatures: Gabriela Núnez de Reyes / German E. Martel Beltrán / Rebeca P. Santos

Private collection
2008-Nis-17 – (en) Prefix: V; Printer: F-CO; Signatures: Edwin Aranque Bonilla / Jorge Oviedo Imboden / Rebeca P. Santos (see comments)