Watch List notes:

4000 Reales de Vellón. (1870ca). Correlative pair. Aramburu Hermanos, Cádiz (matrix on the left). Original sizing. Almost Uncirculated. (To better understand the contextualization of this banknote, we recommend the work "Obligations, vouchers and documents put into circulation as paper money in Spain", by Don Ramón Cobo Huici.)