Examples of the type

Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D)
© Brandon Bertolli (CC BY-SA)
Private collection
1981-Mart-12 – (en) Signatures: Hernán Sáenz Jiménez & Rigoberto Navarro Meléndez
UV activity is not the same, when comparing notes from different years
Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D) Picture 1 of the example of 5 Colones (Series D)
© Brandon Bertolli (CC BY-SA)
Private collection
1990-Ocak-24 – (en) Signatures: Eduardo Lizano Fait & Félix Delgado Quesada
UV activity is not the same, when comparing notes from different years