By Carles Prats.
Note of the author: an article describing this kind of censor marks was already published on a paper Araña (Spring 2017), but as this is my main specialty and I make continuous research on this field, from time to time new marks are discovered and thus, the catalog must be updated. A digital edition of it is the easiest way to make the updates. For this reason, each time a new mark is discovered, this article will be updated.
This is the record of updates and versions:
V.1- August 22, 2018, main body of marks published
V.2- January 25, 2019, two additions
V.3- April 16, 2019, one addition
V.4- April 27, 2019, three additions
INTRODUCTION
The republican penitentiary system was based, from the beginning of the civil war, on four types of detention centers:
1- Chekas.
Of Soviet inspiration, they were improvised jails, managed by political parties and trade union organizations, totally irregular, without any judicial control and in which the most basic rights of the detainees were not respected, since torture was practiced in them and there were carried out extrajudiciary executions. Because of its clandestine nature, very few marks are known used on correspondence coming from this type of detention facilities (see number 40 in this catalog for the only example we have seen).
2- Prisons of the regular penitentiary system.
The prisons and jails already available to the Directorate General of Prisons of the Ministry of Justice were used to house prisoners accused of political crimes, either preventively or to comply with the sentence. In some cases, common criminals were released to house people accused of cooperating or sympathizing with the military uprising. Censorship marks were used.
3- Prison ships.
Before the saturation of the regular penitentiary establishments, anchored ships in the ports of the Mediterranean and the Bay of Biscay were enabled to house the prisoners that no longer fit in the regular prisons. They also depended on the General Directorate of Prisons of the Ministry of Justice, since they were nothing more than temporary accommodation to support the prisons. Own marks of these steamships were used to mark the correspondence directed to or sent from these vessels.
4- Labor Camps.
Created in December 1936 for the execution of sentences of convicted criminals supporting the military uprising. There were two types of camps:
A) Those dependent on the Ministry of Justice.
B) Those dependent on the Ministry of War, Military Information Service (SIM) .
The second type of camps (B) were all located in Catalonia and
were undoubtedly those with toughest living conditions. Both types of
camps used their own censor marks, being the SIM marks of generic
design for each labor camp, only varying the number of the
establishment.
As the republican penal system was only
operative for just over two and a half years and in most cases the
volume of correspondence that inmates could send was limited monthly,
few postal history pieces of this type have survived. Undoubtedly,
the most rare are those belonging to the labor camps of the SIM, with
less than 60 examples known to exist, as they only were operative
from mid 1938 to early 1939. And the most commonly found are the
marks belonging to the prisons of Madrid and Valencia, which, due to
having a greater number of inmates, also generated a greater volume
of correspondence, but this doesn’t mean that these marks can be
considered common.
The rarity ranking of the cataloged marks is as follows:
E- Scarce
R- Rare
RR – Very Rare
RRR – More than very rare
RRRR – Extremely rare, possibly unique.
The marks belonging to SIM’s forced labor camps are marked with * in the catalog.
CATALOG
ALACUÁS / ALAQUÀS
Alacuás Prisoners Cam

“CAMPAMENTO DE PRISIONEROS · ALACUAS / CENSURA”
RRR

“CENSURADA”
RR
ALBATERA
Albatera Labor Camp

“CAMPO DE TRABAJO / ALBATERA / CENSURADA / CONTESTE EN TARJETA / POSTAL”
RRR

“Censurada”
RRR
ALICANTE
Provincial Prison

“Prisión Provincial de Alicante / DIRECCIÓN / CENSURA”
RR

“Prisión Provincial / ALICANTE / CENSURA / Conteste en tarjeta postal”
RR
ALCALÁ DE HENARES
Casa de Trabajo

“CENSURADA”
RRR

“LA CONTESTACION EN / TARJETA POSTAL”
RRR

“BREVEDAD / EN LA CONTESTACIÓN”
RRR

“LA CONTESTACIÓN / BREVE”
RRR

“LA CONTESTACIÓN / BREVE”
RRR

“CENSURADA”
RRR
ALMERÍA
Prisión del Ingenio

“Censura de Correspondencia”
RRR

“CENSURA DE CORRESPONDENCIA / SER
BREVES”
RRR

3.8 cm
“COMISARIA DE INVESTIGACION Y VIGILANCIA / DIRECCION GENERAL DE SEGURIDAD / ALMERIA”
RRR
BARCELONA
Labor camp number 1 (Poble Espanyol)

“Maximo 30 Palabras / en la contestacion”
RRR
BARCELONA
Montjuïc Castle

4 cm. violet.
“CASTILLO DE MONTJUICH *PRISIONES MILITARES*”
RRR
BENISANÓ / BENISSANÓ
Benissanó Castle

“C T J S / CENSURA”
RRRR
CABASSERS
Detachment of SIM’s Labor Camp Number 6

“CAMPO DE TRABAJO Nº 6 / DESTACAMENTO Nº 3”
RRRR
CEHEGÍN
Casa de Reforma

“CASA DE REFORMA – CEHEGIN / *CENSURADA*/ CONTESTE EN TARJETA POSTAL”
RRR
GANDÍA
Escolapios Prison

“D.P.Nº 1 – GANDIA / CENSURA” (D.P. for Depósito de Prisioneros)
RR
21a- Used by Francoist administration of the same prison
RRR
GANDÍA
Prisión Nueva de Santa Clara

“Prisión Nueva Santa Clara / CENSURADA”
RRR
LABOR CAMP NUMBER 2, SIM
Several locations: L’Hospitalet de l’Infant, Montferrer & La Seu d’Urgell

“MINISTERIO DE DEFENSA NACIONAL * S.I.M.* / CAMPO DE TRABAJO / Nº 2”
RRR
LABOR CAMP NUMBER 3, SIM
Several locations: Omells de Na Gaia, Vilasana & Cabó

“MINISTERIO DE DEFENSA NACIONAL * S.I.M.* / CAMPO DE TRABAJO / Nº 3”
RRR
LABOR CAMP NUMBER 4, SIM
Several locations: Concabella & Barbens

“MINISTERIO DE DEFENSA NACIONAL * S.I.M.* / CAMPO DE TRABAJO / Nº 4”
RRR
LABOR CAMP NUMBER 6, SIM
Several locations: Falset (detachments in Cabassers, La Figuera, Gratallops & Porrera), Arbeca & Cabó

“MINISTERIO DE DEFENSA NACIONAL * S.I.M.* / CAMPO DE TRABAJO / Nº 6”
RRR
SIM LABOR CAMPS, DEVOLUTION MARKS

RRRR

“SOLO SE ADMITEN / TARJETAS POSTALES CON / 20 PALABRAS DE TEXTO”
RRRR

“Rehusada por el / agente del SIM”
RRRR
MADRID
Modelo Prison

“SED BREVES EN LAS CONTESTACIONES”
E
MADRID
Provisional Prison for Men Nr 3, known as General Porlier prison

“Censurada”
E

“CENSURA”
R

“SED BREVES EN LAS CONTESTACIONES”
E
MÁLAGA
Prison ship Marqués de Chávarri, Málaga harbor

“MARQUÉS DE CHÁVARRI”
RRR
ORIHUELA
Orihuela Labor Camp

“GOBIERNO / CIVIL / CENSURA / DE / PRENSA”
RRR

“SED BREVES”
RRR

“CENSURADA”
RRR
SEGORBE
Prison in Valencia street, number 5 (Seminar)

“CENSURADO / PRISIÓN GUBERNATIVA”
RRR

“Censurado / Prision Gubernativa”
RRR

“Maximo 30 Palabras / en la contestacion”
RRR
TARRAGONA
Prison ship Isla de Menorca, Tarragona harbor

“COMANDANTE BUQUE PRISIÓN / ISLA DE MENORCA / TARRAGONA”
RRR
TARRAGONA
Prison ship Mahón, Tarragona harbor

“COMANDANTE BUQUE PRISIÓN / MAHÓN / DE / MAHÓN”
RRR
VALENCIA
San Miguel de los Reyes Prison

“D.P.Nº 1 – VALENCIA / CENSURA” (D.P. for Depósito de Prisioneros)
E
43a- Used by Francoist administration of the same prison
RRR
VALENCIA
Celular Prison

“PRISIÓN CELULAR DE VALENCIA / CENSURADA”
E
VALENCIA
Unidentified prishon ship in El Grao harbor

“AGRUPACION SOCIALISTA / COMITÉ / EL GRAO DE VALENCIA”
RRRR