20 Centimos Guadalcanal

The origin of this cardboard currency must be sought in a decree of the Council of Ministers dated February 24, 1938, by which the issuance of cardboard discs, printed on one side only, was authorized. with the coat of arms of the Second Republic, to which a postage stamp was affixed on the obverse, which was what established their monetary value - normally reduced, just a few cents - of them.

However, there are some items on the market that did not include the aforementioned shield of the Second Republic, but rather various motifs along with the names of different Spanish towns that, presumably, would have issued them... All of them dated in 1937 - that is, prior to the aforementioned decree of 1938.

The most common theory that these cardboard coins were produced in early 90-th by unknown issuer. Someone spent a lot of time, effort, knowledge, resources and money to make a cartoon of each town in Spain of those time since there are many cartoon coins that are from towns that only existed in those years. there are coins from Cataluña, Huesca, Oviedo, Pontevedra, Alicante, Almería, Valencia, Murcia, Castellon, Madrid, Cuenca, Toledo, Guadalajara, Málaga, Córdoba, Sevilla, Ciudad Real, Granada, Baleares, Avila, Coruña, Huelva, Navarra, Albacete, Alava, Guipuzcoa, Salamanca, Cáceres, Badajoz, Valladolid, Cádiz etc. 

Some sources of additional information: 1, 2