The 5 centavos Mariano Moreno

The 1CLt printing is on clay paper, and was issued in sheets as well as booklets. Below is an example from the booklet printing. Quick links: design / issues summary / 1E / 1Et / 1CLt / selected postmarks / a second batch of postmarks / a third batch of postmarks
Here is a detail from the multiple shown above.
Here is a block of four of the 1CLt printing.
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