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Portuguese republican flags (1910ies)

Portuguese Carbonerians
Federal Democratic Center «November 15th»
C.P.O.

See also:

Portuguese Carbonerians / Carbonária

The republican revolution of 1910 (and previous attempts and demonstrations) was largely inspired by a radical republican secret society called Carbonária (akin to the Masonry), inspired in an older italian organization of the same name. These called themselves the charcoal-makers (carbonari), who were free to go out of town to the forests get their wood… and conspire at will away from the landlord’s spys — hence the alias The Forest Masons (Maçonaria Florestal). Being Saint John the patron of charcoal-makers, red and green was also theier color, both of genuine charcoal-makers guild and of the later secret society, and later the color of portuguese radical republicans…
António Martins, 19 Feb 1998

I didn’t know the Carbonari existed outside of Italy. The Carbonari flag was horizontal stripes of blue (top), red and black, representing the burning charcoal.
Dave Martucci, 22 Feb 1998

Portuguese Carbonarians (namely Associação 31 de Janeiro, in Oporto) used a red flag with a green circle and some lettering. I was told these are based on (charcoal maker’s patron) St. John.
António Martins, 3 Mar 1998

Federal Democratic Center «November 15th» / Centro Democrático Federal «15 de Novembro»

image by Jorge Candeias, 19 Feb 2005

The flag of the Centro Democrático Federal «15 de Novembro»; approx. 1:2 red field with green disc, on it "15 / DE / NOVEMBRO", red, in three lines, and arched above, in larger green letters, "CENTRO DEMOCRATICO FEDERAL" (no accent mark).
António Martins, 15 Mar 2000

C.P.O.

image by José Manuel Erbez, 14 Mar 2000

Flag shown in the cover of the book La revolución portuguesa (The Portuguese revolution), by J. Brissa, edited in Barcelona in 1910.
Santiago Dotor, 14 Mar 2000

I have no idea about the green triangle on this flag from Brissa’s book. All other differences (wording and ratio) seem to be variants of a popular design. "C.P.O." might mean "Centro Popular Operário" (Worker’s People’s Center).
António Martins, 15 Mar 2000 and Dec 2001